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Saturday, December 1, 2018

Mind uploading in fiction

From Wikipedia, the free encyclopedia

ArtificialFictionBrain.png

Mind uploading, whole brain emulation or substrate-independent minds is a use of a computer or another substrate as an emulated human brain, and the view of thoughts and memories as software information states. The term mind transfer also refers to a hypothetical transfer of a mind from one biological brain to another. Uploaded minds and societies of minds, often in simulated realities, are recurring themes in science fiction novels and films since 1950s.

Early and particularly important examples

An early story featuring technological transfer of memories and personality from one brain to another is "Intelligence Undying" by Edmond Hamilton, first published in the April 1936 issue of Amazing Stories. In this story, an elderly scientist named John Hanley explains that when humans are first born, "our minds are a blank sheet except for certain reflexes which we all inherit. But from our birth onward, our minds are affected by all about us, our reflexes are conditioned, as the behaviorists say. All we experience is printed on the sheet of our minds. ... Everything a human being learns, therefore, simply establishes new connections between the nerve-cells of the brain. ... As I said, a newborn child has no such knowledge-connections in his cortex at all—he has not yet formed any. Now if I take that child immediately after birth and establish in his brain exactly the same web of intricate neurone-connections I have built up in my own brain, he will have exactly the same mind, memories, knowledge, as I have ... his mind will be exactly identical with my mind!" He then explains he has developed a technique to do just this, saying "I've devised a way to scan my brain's intricate web of neurone connections by electrical impulses, and by means of those impulses to build up an exactly identical web of neurone connections in the infant's brain. Just as a television scanning-disk can break down a complicated picture into impulses that reproduce the picture elsewhere." He adds that the impulses scanning his brain will kill him, but the "counter-impulses" imprinting the same pattern on the baby's brain will not harm him. The story shows the successful transfer of John Hanley's mind to the baby, who he describes as "John Hanley 2nd", and then skips forward to the year 3144 to depict "John Hanley, 21st" using his advanced technology to become the ruler of the Earth in order to end a war between the two great political powers of the time, and then further ahead to "John Hanley, 416th" helping to evacuate humanity to the planet Mercury in response to the Sun shrinking into a white dwarf. He chooses to remain on Earth awaiting death, so that people would "learn once more to do for themselves, would become again a strong a self-reliant race", with Hanley concluding that he "had been wrong in living as a single super-mind down through the ages. He saw that now, and now he was undoing that wrong."

A story featuring human minds replicated in a computer is the novella Izzard and the Membrane by Walter M. Miller, Jr., first published in May 1951. In this story, an American cyberneticist named Scott MacDonney is captured by Russians and made to work on an advanced computer, Izzard, which they plan to use to coordinate an attack on the United States. He has conversations with Izzard as he works on it, and when he asks it if it is self-aware, it says "answer indeterminate" and then asks "can human individual's self-awareness transor be mechanically duplicated?" MacDonney is unfamiliar with the concept of a self-awareness transor (it is later revealed that this information was loaded into Izzard by a mysterious entity who may nor may not be God), and Izzard defines it by saying "A self-awareness transor is the mathematical function which describes the specific consciousness pattern of one human individual." It is later found that this mathematical function can indeed be duplicated, although not by a detailed scan of the individual's brain as in later notions of mind uploading; instead, Donney just has to describe the individual verbally in sufficient detail, and Izzard uses this information to locate the transor in the appropriate "mathematical region". In Izzard's words, "to duplicate consciousness of deceased, it will be necessary for you to furnish anthropometric and psychic characteristics of the individual. These characteristics will not determine transor, but will only give its general form. Knowing its form, will enable me to sweep my circuit pattern through its mathematical region until the proper transor is reached. At that point, the consciousness will appear among the circuits." Using this method, MacDonney is able to recreate the mind of his dead wife in Izzard's memory, as well as create a virtual duplicate of himself, which seems to have a shared awareness with the biological MacDonney.

In The Altered Ego by Jerry Sohl (1954), a person's mind can be "recorded" and used to create a "restoration" in the event of their death. In a restoration, the person's biological body is repaired and brought back to life, and their memories are restored to the last time that they had their minds recorded (what the story calls a 'brain record'), an early example of a story in which a person can create periodic backups of their own mind which are stored in an artificial medium. The recording process is not described in great detail, but it is mentioned that the recording is used to create a duplicate or "dupe" which is stored in the "restoration bank", and at one point a lecturer says that "The experience of the years, the neurograms, simple memory circuits—neurons, if you wish—stored among these nerve cells, are transferred to the dupe, a group of more than ten billion molecules in colloidal suspension. They are charged much as you would charge the plates of a battery, the small neuroelectrical impulses emanating from your brain during the recording session being duplicated on the molecular structure in the solution." During restoration, they take the dupe and "infuse it into an empty brain", and the plot turns on the fact that it is possible to install one person's dupe in the body of a completely different person.

An early example featuring uploaded minds in robotic bodies can be found in Frederik Pohl's story "The Tunnel Under the World" from 1955. In this story, the protagonist Guy Burckhardt continually wakes up on the same date from a dream of dying in an explosion. Burckhardt is already familiar with the idea of putting human minds in robotic bodies, since this is what is done with the robot workers at the nearby Contro Chemical factory. As someone has once explained it to him, "each machine was controlled by a sort of computer which reproduced, in its electronic snarl, the actual memory and mind of a human being ... It was only a matter, he said, of transferring a man's habit patterns from brain cells to vacuum-tube cells." Later in the story, Pohl gives some additional description of the procedure: "Take a master petroleum chemist, infinitely skilled in the separation of crude oil into its fractions. Strap him down, probe into his brain with searching electronic needles. The machine scans the patterns of the mind, translates what it sees into charts and sine waves. Impress these same waves on a robot computer and you have your chemist. Or a thousand copies of your chemist, if you wish, with all of his knowledge and skill, and no human limitations at all." After some investigation, Burckhardt learns that his entire town had been killed in a chemical explosion, and the brains of the dead townspeople had been scanned and placed into miniature robotic bodies in a miniature replica of the town (as a character explains to him, 'It's as easy to transfer a pattern from a dead brain as a living one'), so that a businessman named Mr. Dorchin could charge companies to use the townspeople as test subjects for new products and advertisements.

Something close to the notion of mind uploading is very briefly mentioned in Isaac Asimov's 1956 short story The Last Question: "One by one Man fused with AC, each physical body losing its mental identity in a manner that was somehow not a loss but a gain." A more detailed exploration of the idea (and one in which individual identity is preserved, unlike in Asimov's story) can be found in Arthur C. Clarke's novel The City and the Stars, also from 1956 (this novel was a revised and expanded version of Clarke's earlier story Against the Fall of Night, but the earlier version did not contain the elements relating to mind uploading). The story is set in a city named Diaspar one billion years in the future, where the minds of inhabitants are stored as patterns of information in the city's Central Computer in between a series of 1000-year lives in cloned bodies. Various commentators identify this story as one of the first (if not the first) to deal with mind uploading, human-machine synthesis, and computerized immortality.

Another of the "firsts" is the novel Detta är verkligheten (This is reality), 1968, by the renowned philosopher and logician Bertil Mårtensson, a novel in which he describes people living in an uploaded state as a means to control overpopulation. The uploaded people believe that they are "alive", but in reality they are playing elaborate and advanced fantasy games. In a twist at the end, the author changes everything into one of the best "multiverse" ideas of science fiction.

In Robert Silverberg's To Live Again (1969), an entire worldwide economy is built up around the buying and selling of "souls" (personas that have been tape-recorded at six-month intervals), allowing well-heeled consumers the opportunity to spend tens of millions of dollars on a medical treatment that uploads the most recent recordings of archived personalities into the minds of the buyers. Federal law prevents people from buying a "personality recording" unless the possessor first had died; similarly, two or more buyers were not allowed to own a "share" of the persona. In this novel, the personality recording always went to the highest bidder. However, when one attempted to buy (and therefore possess) too many personalities, there was the risk that one of the personas would wrest control of the body from the possessor.

In the 1982 novel Software, part of the Ware Tetralogy by Rudy Rucker, one of the main characters, Cobb Anderson, has his mind downloaded and his body replaced with an extremely human-like android body. The robots who persuade Anderson into doing this sell the process to him as a way to become immortal.

In William Gibson's award-winning Neuromancer (1984), which popularized the concept of "cyberspace", a hacking tool used by the main character is an artificial infomorph of a notorious cyber-criminal, Dixie Flatline. The infomorph only assists in exchange for the promise that he be deleted after the mission is complete.

The fiction of Greg Egan has explored many of the philosophical, ethical, legal, and identity aspects of mind transfer, as well as the financial and computing aspects (i.e. hardware, software, processing power) of maintaining "copies." In Egan's Permutation City (1994), Diaspora (1997) and Zendegi (2010), "copies" are made by computer simulation of scanned brain physiology. See also Egan's "jewelhead" stories, where the mind is transferred from the organic brain to a small, immortal backup computer at the base of the skull, the organic brain then being surgically removed.

The movie The Matrix is commonly mistaken for a mind uploading movie, but with exception to suggestions in later movies, it is only about virtual reality and simulated reality, since the main character Neo's physical brain still is required to reside his mind. The mind (the information content of the brain) is not copied into an emulated brain in a computer. Neo's physical brain is connected into the Matrix via a brain-machine interface. Only the rest of the physical body is simulated. Neo is disconnected from and reconnected to this dreamworld.

James Cameron's 2009 movie Avatar has so far been the commercially most successful example of a work of fiction that features a form of mind uploading. Throughout most of the movie, the hero's mind has not actually been uploaded and transferred to another body, but is simply controlling the body from a distance, a form of telepresence. However, at the end of the movie the hero's mind is uploaded into Eywa, the mind of the planet, and then back into his Avatar body.

Further examples

Mind transfer is a theme in many other works of science fiction in a wide range of media. Specific examples include the following:

Literature

  • Frederik Pohl's story The Tunnel under the World (1955). See above article.
  • Isaac Asimov's short story The Last Question (1956). See above article.
  • Arthur C. Clarke's The City and the Stars (1956). See above article.
  • In the Noon Universe created by Arkady and Boris Strugatsky, the Great Encoding of 2121 was the first known attempt to completely store an individual's personality on an artificial medium. The final stages of the Encoding are described in the chapter 14 of Noon: 22nd Century (Candles Before the Control Board), first published in 1961.
  • Clifford D. Simak's Hugo-shortlisted novel Time is the Simplest Thing (1961) is based around mind copying and uploading. The initial swap involves 'the Pinkness' giving 'Shep Blaine' a very large number of minds that it has collected over the aeons in exchange for a copy of his mind.
  • Philip José Farmer's World of Tiers series (1965–1993) introduces the villainous Bellers, who were laboratory machines designed to temporarily hold Lord's consciousness between clone bodies, which became sentient and self replicating.onto a Holopox unit shortly before being nuked by the KGB.
  • In Roger Zelazny's Lord of Light (1967), the characters can technologically "transmigrate" their minds into new bodies.
  • In Arthur C. Clarke's novel 2001: A Space Odyssey (1968), the beings controlling the monoliths were once alien lifeforms that had uploaded their minds into robotic bodies and finally into the fabric of space and time itself. The character Dave Bowman undergoes an uploading from the body of a human into a "ghost", as he is described in later books.
  • Bertil Mårtensson's novel Detta är verkligheten (This is reality), 1968. See above article for details.
  • Robert Silverberg's novel To Live Again (1969). See opening section for details.
  • Gene Wolfe's novella The Fifth Head of Cerberus (1972) features a robot named "Mr. Million" whose mind is an uploaded version of the original man who the narrator ('Number Five') was cloned from, and who acts as the narrator's tutor.
  • John Sladek's satirical The Muller-Fokker Effect (1973), in which a human mind could be recorded on cassette tapes and then imprinted on a human body using tailored viruses.
  • In an interesting reversal of the typical mind-transfer story, in Robert A Heinlein's Time Enough for Love (1973) a sentient computer transfers "her" mind into a genetically engineered human body.
  • In James P. Hogan's The Giants novels (1977–2005), stable FTL travel takes weeks if not months, so people upload their minds into an intergalactic network controlled by the AI known as VISAR. The network also supports a large series of virtual worlds for people to interact.
  • Michael Berlyn's The Integrated Man (1980), where a human mind, or part of it (or even just a set of skills) can be encoded on a chip and inserted into a special socket at the base of the brain.
  • Rudy Rucker's novel Software (1982). See opening section for details.
  • C. J. Cherryh's novel Voyager in Night (1984). An ancient alien vessel uploads various beings that it meets.
  • In Heroes Unlimited (1984) under the Robot category, a human pilot has a transferred intelligence category that transfers a human intelligence over a distance into the body of a robot. This option is also available in Rifts Sourcebook 1. In either case it can be permanent.
  • William Gibson's novel Neuromancer (1984). See opening section for details.
  • Frederik Pohl's novel Heechee Rendezvous (1984) was the first in his Heechee series in which the protagonist Robinette Broadhead had been uploaded into a computer after his death. The technology was first introduced in Pohl's previous novel in the Gateway tetralogy, Beyond the Blue Event Horizon (1982)
  • Larry Niven deals with mind-transfer in his short stories: memories from 'corpsicles' (cryogenically frozen bodies) are transferred to mindwiped criminals. In the novels The Smoke Ring (1987) and The Integral Trees (1984), a human is voluntarily 'translated' into a computer program to operate as a starship's guiding intelligence.
  • Iain M. Banks's Culture series (1987–) make extensive reference to the transfer of mind-states.
  • Greg Bear's novel Eternity (1988) features a main character discovering a captured uploaded mind of a type of alien called a "Jart", whose civilization is later discovered to have the goal of uploading and digitizing as many minds and life-forms as possible with the hope of preserving them in a future "Final Mind" similar to Teilhard or Tipler's conception of the Omega Point. The story also features Bear's notion of the Taylor algorithms which allow a mentality to discover what type of system it is running on (for example, Bear writes on p. 109 that with these algorithms, "a downloaded mentality could tell whether or not it had been downloaded").
  • Janet Asimov's Mind Transfer (1988) journeys through the birth, life, death, and second life of a man whose family pioneers human-to-android mind transfer. It also explores the ethical and moral issues of transferring consciousness into an android at the moment of death, and examines the idea of prematurely activating an android which has not yet accepted a human brain scan.
  • Several characters in Kyle Allen's The Archon Conspiracy (1989) are repeatedly killed and resurrected in prosthetic bodies, once a "pattern map" of their brains is recovered and hard-wired into an artificial neural net. The main antagonist uses a similar process to construct a memetic computer virus, in the process uploading the personality of a notorious serial killer into several thousand people.
  • Roger MacBride Allen's The Modular Man (1992) portrays the interior experience of a personality copied into a vacuum cleaner and his legal battle for recognition as a legal personality. See also Political ideas in science fiction.
  • Peter James' Host (1993). A group of scientists is researching the feasibility of the upload to achieve immortality. Unfortunately it turns out that there are some unforeseen problems with the combination of human emotions and the power to use computers and the internet to manipulate the real world.
  • In the novel Feersum Endjinn (1994) by Iain M. Banks, the minds of the dead are uploaded into a computer network known as "the data corpus", "cryptosphere" or simply "crypt", allowing them to be routinely reincarnated. The story revolves around two characters who are trying to reactivate a piece of ancient technology, the "Fearsome Engine", which can prevent the Sun from dimming to the point where life on Earth becomes extinct.
  • Greg Egan's novels Permutation City (1994), Diaspora (1997) and Zendegi (2010). See opening section for details.
  • In Endgame (1996), the last novel of the Doom series by Dafydd Ab Hugh and Brad Linaweaver, the alien race known as Newbies attempts to transfer Fly Taggart's and Arlene Sanders's souls to a computer simulation based on their memories. However, due to difference between "formats" of human soul and soul of any other being in the galaxy, they accidentally copied their soul, with one copy trapped in the simulation and the other left in their bodies.
  • In Garth Nix's Shade's Children (1997), Shade is an uploaded consciousness acting in loco parentis to teenagers to help save them from evil Overlords. Shade contemplates at times how human he is, especially as his personality degenerates during the story; and whether or not he should have a new human body.
  • In Charles Platt's novel The Silicon Man (1997), an FBI agent who has stumbled on a top-secret project called LifeScan is destructively uploaded against his will. Realistically describes the constraints of the process and machinery.
  • Tad Williams's Otherland series (1998–2002) concerns the activities of a secret society whose goals include creating a virtual reality network where they will be uploaded and in which they will live as gods. Otherland contains a very hard SF approach to the topic, but balances the hard approach with fantastical adventures of the protagonists within the virtual reality network.
  • Gene Wolfe's trilogy The Book of the Short Sun (1999–2001) features an old generation starship called the Whorl which is run by a group of uploaded rulers who have set themselves up as gods. Once the Whorl arrives at a star system with habitable planets, they send giant "godlings" to the humans on board to encourage them to depart the ship.
  • In Abduction (2000) by Robin Cook, a group of researchers discover an underwater civilization which achieved immortality by transferring their minds into cloned bodies.
  • In Alastair Reynolds' Revelation Space universe (2000–), a complete and functioning copy of the mind is described as an alpha-level simulation while a non-sentient copy of the mind based on predictive behavioural pattern of a person's mind is described as a beta-level simulation.
  • In Eater (2000) by Gregory Benford, mind-uploading (or consciousness-uploading) is a "demand" of the major antagonist, which is a "magnetic intelligence" (composed of similarly encoded minds) anchored on the event horizon of a black hole. The major character's wife, who is dying of cancer, has her consciousness uploaded into a computer and mounts an attack on the entity, achieving a type of immortality in the process.
  • Kiln People (2002) by David Brin postulates a future where people can create clay duplicates of themselves with all their memories up to that time. The duplicates only last 24 hours, and the original can then choose whether or not to upload the ditto's memories back into himself afterward. Most people use dittos to do their work.
  • Richard K. Morgan's Altered Carbon (2002) and other Takeshi Kovacs books, where everyone has a "cortical stack" implanted at the base of their skull, soon after being born. The device then records all your memories and experiences in real-time. The stack can be "resleeved" in another body, be it a clone or otherwise, and/or backed up digitally at a remote location.
  • Vernor Vinge's novella The Cookie Monster (2003) explores the possibility of mind uploads who are not aware they have been uploaded, and who are kept as unknowing slaves doing technical research in a simulation running at high speed relative to the outside world.
  • In Cory Doctorow's Down and Out in the Magic Kingdom (2003), the plot is set in motion when the main character is killed and "restored from backup", a process which entails the creation of a clone and flashing the clone's brain with an image stored on a computer.
  • In Carlos Atanes' FAQ: Frequently Asked Questions (2004) the Sisterhood of Metacontrol transfer Angeline's consciousness into the virtual world of the Réseau Céleste.
  • Robert J. Sawyer's novel Mindscan (2005) deals with the issue of uploaded consciousness from the perspective of Jake Sullivan: both of them. The human Jake has a rare, life-threatening disease and to extend his life he decides to upload his consciousness into a robotic body; but things don't go quite as planned.
  • In the Old Man's War series (2005–) by John Scalzi, the minds of volunteer retirees are transferred to younger, genetically enhanced versions of themselves in order to enable them to fight for the Colonial Defence Forces (CDF). In The Android's Dream, two characters' minds are uploaded onto computers.
  • In The Battle of the Labyrinth (2008) by Rick Riordan, Daedalus/Quintus transfers his mind to an automaton by means of a combination of mechanics and magic.
  • The book and podcast novel series 7th Son (2009) from JC Hutchins focuses purely on mind uploading and cloning. Combining two ethically situational sciences and turning it into a thriller series when a terrorist clone can copy his consciousness to other people's minds.
  • In Peter F. Hamilton's Void Trilogy (2007–2010) humans are able to upload into the machine intelligence known as ANA. The same theme is found in P F Hamilton's Mindstar Rising (1993) in which an industrialist's mind is also uploaded to a storage device.
  • Similar themes are also found in Broken Angels and Altered Carbon by Richard Morgan.
  • Hannu Rajaniemi's Quantum Thief series (2010–2014), which includes the novels The Quantum Thief, The Fractal Prince and The Causal Angel, describes a posthuman world where uploaded minds (named gogols) are widely used as intellectual software utilized for various purposes including data analysis, planning and control of embedded systems.
  • Clyde Dsouza's Memories with Maya (2013) looks at how deep learning processes, and 'Digital Breadcrumbs' left behind by people (tweets, Facebook updates, blogs) combined with memories of living relatives can be used to re-construct a mind and augment it with narrow AI libraries. The resulting 'Dirrogate' or Digital Surrogate can be thought of as a posthumous mind upload.
  • In the novel So Far Out to Sea by Dane St. John, the visionary Abraham Trevis must locate a habitable exoplanet and plot out a journey to get there, in which he plans to use an experimental process called "relocation" to allow humans to survive the inhospitable forces of space and time – it consists of specialized nanotechnology called "architects", engineered for the purpose of replicating neurons and all individual experiences, learnings, and emotional traits.
  • In the novel Transapient (2017) by Andy Brown, the first sentient beings are created in the year 2060 by capturing the state of the human brain (the molecular brain state matrix) and uploading this to a synthetic body. The story begins from the perspective of the first Transapient Alf#1 who is initially unaware of his new state. A second Transapient Alf#2 is created from the same matrix, resulting in confusion for his human wife Louisa. Ultimately the Transapients find roles in space exploration and colonisation.

Film

  • In the film The Creation of the Humanoids (1962), set in the future after a nuclear war, the blue-skinned androids known as "humanoids" are trying to infiltrate human society by creating android replicas of humans that have recently died, using a procedure called a "thalamic transplant" to take the memories and personality of the recently deceased human and place them in the replicas.
  • In the 1979 film Star Trek: The Motion Picture, the entity that calls itself V'Ger is a heavily-modified Earth space probe that is capable of converting lifeforms and objects such as spacecraft into digitized "data patterns", which can then be represented in holographic or even physical form. The best example of this is when a probe from V'Ger kills the Starship Enterprise's navigator, Lieutenant Ilia, and then generates a mechanized duplicate of her to act as its representative to the Enterprise crew. In the film, it is stated that the duplicate is so detailed as to simulate humanoid biological functions, as well as contain the original Ilia's memory patterns, which the crew attempts to uncover in order to better understand V'Ger's motives.
  • In the film Tron (1982), human programmer Flynn is digitized by an artificial intelligence called the "Master Control Program", bringing him inside the virtual world of the computer.
  • Mamoru Oshii/Masamune Shirow's anime/manga Ghost in the Shell (1989–) portrays a future world in which human beings aggressively mechanize, replacing body and mind with interfacing mechanical/computer/electrical parts, often to the point of complete mechanization/replacement of all original material. Its sequel, Ghost in the Shell 2: Innocence deals heavily with the philosophical ramifications of this problem.
  • The film The Lawnmower Man (1992) deals with attempts by scientists to boost the intelligence of a man named Jobe using a program of accelerated learning, using nootropic drugs, virtual reality input, and cortex stimulation. After becoming superintelligent, Jobe finds a way to transfer his mind completely into virtual reality, leaving his physical body as a wizened husk.
  • The film Freejack (1992) describes a future where the wealthy can seize people out of the past, moments before their death, and transfer their own mind & consciousness to the newly captured body, at the expense of that person's mind. A "freejack" is what an escapee of this process is called. The computer equipment which stores a mind temporarily while it awaits transplant is referred to as "the spiritual switchboard".
  • The Thirteenth Floor (1999) is set in late 1990s Los Angeles, where Hannon owns a multibillion-dollar computer enterprise, and is the inventor of a newly completed virtual reality (VR) simulation of 1937 Los Angeles. But Hannon dies and his protégé eventually discovers that the 1990s Los Angeles itself is a simulation.
  • In the film The 6th Day (2000), the contents of a brain can be downloaded via the optic nerves, and copied to clones.
  • Chrysalis, a 2007 French movie about an experimental machine capable of partially uploading minds. Minds cannot function in purely digital form, they must be placed back into a human container.
  • The central conceit of the 2009 science fiction film Avatar is that human consciousness can be used to control genetically grown bodies (Avatars) based on the native inhabitants of an alien world, in order to integrate into their society. This is not true mind uploading, as the humans only control the Avatars remotely (a form of telepresence), but later in the film Grace connects with Eywa (the collective consciousness of the planet) so her mind can be permanently transferred to her Avatar body. Her mind is uploaded to Eywa, but she does not return to her Avatar body and stays within the Tree of Souls. At the end of the film, Jake's mind is uploaded to Eywa and successfully returns to his Avatar body leaving his human body lifeless. The basis for this type of transfer is not explained in detail, but it seems to have a physical basis rather than being something more mystical, given that Grace had earlier described Eywa as a "global network" (like a neural network) made up of electrochemical "connections" (which she said were "like the synapses between neurons") between the roots of trees, and also said that "the Na'vi can access it—they can upload and download data—memories".
  • In the 2014 movie Captain America: The Winter Soldier, Arnim Zola, a biochemist for HYDRA developed a terminal disease and he transferred his consciousness to a giant computer that took up the entire area of an old, abandoned S.H.I.E.L.D. facility in New Jersey.
  • In the 2014 movie Transcendence, Dr. Will Caster, an artificial intelligence researcher, is assassinated with a bullet laced with radioactive material and has his consciousness uploaded to several quantum processors (and eventually the internet) in order for him to survive in a digital form.
  • In the 2015 movie CHAPPiE the title character Chappie transfers the dying Deon's consciousness into a spare robot through a modified neural helmet.
  • In the 2015 film Advantageous, Gwen Koh is made to choose between having her consciousness transferred to a different body in order to keep her job as the face of a technology company or not having the resources to give her daughter the education that will maintain her position in a socially and economically stratified society.
  • In the 2015 film Self/less the super wealthy are offered the extension of their lives through the transfer of their minds into what are presented as cloned bodies, but are actually humans whose memories are overwritten and suppressed.

Television

  • In the 1985 TV movie Max Headroom and ABC Television series, TV reporter Edison Carter is copied into Network 23's computers creating the TV personality Max Headroom.
  • Red Dwarf (1988–1999), where a person's memories and personality can be recorded in just a few seconds and, upon their death, they can be recreated as a holographic simulation. Arnold Rimmer is an example of such a person.
  • In Star Trek: The Next Generation season 2 episode 6 "The Schizoid Man" (1989), Dr Ira Graves uploads his mind into Data's positronic brain. He later downloads his memories into the Enterprise's computer, although his personality has been lost. His memories reduced to raw data of events.
  • In Star Trek: The Next Generation season 7 episode 10 "Inheritance" (1994), Data encounters his "mother" who unknown to her, had her mind scanned by synaptic scanner by her husband (and Datas "father") Dr Noonien Soong. This was done while she was unconscious, and days before her death an exact copy of her brain was transferred to a positronic matrix, inside a gynoid body (but labeled android body on the show).
  • In Battle Angel Alita (1990–, also known as Gunnm), a closely guarded secret of the elite city of Tiphares/Zalem is that its citizens, after being eugenically screened and rigorously tested in a maturity ritual, have their brains scanned, removed and replaced with chips. When this is revealed to a Tipharean/Zalem citizen, the internalized philosophical debate causes most citizens to go insane.
  • In the Phantom 2040 TV series (1994–) and videogame (1995), Maxwell Madison Sr., the husband of one of the series' main antagonists Rebecca Madison, is killed during a train wreck with the 23rd Phantom and his brainwaves are uploaded onto a computer mainframe. Rebecca plans to download his brainwaves into a living or artificial body to bring him back to life.
  • The second of the four TekWar TV movies, titled "TekLords" (1994), featured the uploaded intelligence of a drug lord's sister, who had been killed in an attempt on his life.
  • In Yu-Gi-Oh! (1996–), Noah Kaiba died in a car accident and his mind was uploaded to a supercomputer.
  • In the TV series Stargate SG-1 (1997–2007), the Asgard cheat death by transferring their minds into new clone bodies. The mind of Thor, the high commander of the Asgard fleet, was for a time transferred into the computer of a Goa'uld spaceship. In the episode "Tin Man" (1998), the SG-1 team visit a warehouse of an extinct alien civilization, where the android caretaker scans their minds and builds android duplicates of the team, who are unaware that they aren't the originals until they find their original bodies in suspended animation. In "Holiday" (1999) Dr. Daniel Jackson's mind is transferred into Machello's body and vice versa. In "Entity" (2001) Samantha Carter's mind is transferred into a computer. In "Lifeboat" (2003) around 12 minds are transferred into and then out of Daniel Jackson's body. In the two-part opening of season 8, "New Order" (2004), Jack O'Neill's mind is fully interfaced with the main computer of Thor's ship.
  • In the TV series Stargate Atlantis, after being infected with Asuran (Replicator) Nanites, Dr. Weir is capable of accessing and uploading herself in the Asuran collecive network.
  • In the TV series Stargate Universe, the consciousnesses of a number of deceased characters are uploaded to the Destiny's main computer, where they exist as live computer programs which can interact with the crew via induced audiovisual hallucinations.
  • Cowboy Bebop episode 23 "Brain Scratch" (1999) is about a cult dedicated towards electronic transference of the mind into a computer network.
  • In the French animated series Code Lyoko (2003–), the primary characters use devices called Scanners that read the entire physical makeup of the user, digitize their atoms and then teleport the user onto the virtual world of Lyoko.
  • In the television series Caprica (2009–2010), a prequel to Battlestar Galactica, the ability to upload human consciousnesses into a virtual reality world is featured prominently. (Battlestar Galactica did not itself feature true mind uploading, since the cylons were artificial intelligences that were not based on ordinary human brains, though their minds could be transferred from one body to another in the same manner as is often envisioned for uploads.) While some characters believe that the process only creates an imperfect copy of the original person, as the death of the original consciousness is unnecessary for the creation of the virtual copy, other characters believe that it can be viewed as a form of religious rebirth analogous to the afterlife.
  • Mind transfer is a central theme in the television series Dollhouse (2009–2010).
  • In the anime series Serial Experiments Lain, the antagonist Masami Eiri embeds his memories and consciousness into the "Wired", the internet of the story universe. He believed that humanity should evolve by ridding themselves of their physical limitations and live as digital entities only.
  • In the second installment of the story The Trial of a Time Lord in the original Doctor Who series, the Doctor's assistant Perpugilliam Brown has her mind erased, and replaced with the mind of the dying Lord Kiv of the Mentors. The storyline mentions that this is the first time the entire mind of an individual can be transplanted from one body to another. It is a pivotal moment in the history of the series as it is the purported reason that the Time Lords took the Doctor out of time and placed him on trial. It was later shown to be false evidence in the Doctor's trial.
  • In the episode Silence in the Library of the 2005 revival of the British television show Doctor Who Donna Noble is "saved" by the computer Cal where she joins several others inside the computer that had been saved previously. Arguably the process of saving the individuals is more involved then simple mind uploading as the teleportation patterns of the individuals are also stored and the Doctor is able in the next episode Forest of the Dead to get Cal to return them to the physical world. However, also in Forest of the Dead, the character of River Song, is killed but the doctor is able, using a future Doctor's sonic screwdriver to upload River's consciousness into Cal thus extending her life indefinitely.
  • In the episode "13.1" of the show Warehouse 13, former Warehouse Agent Hugo Miller's hologram appears when an attempt is made to upgrade the computer systems inside the Warehouse. In fear of being deleted during the upgrade, Hugo locks down the entire Warehouse and attempts to kill everyone inside. Hugo's hologram is later identified as a portion of the agent's mind in which he uploaded onto the Warehouse computers using an artifact, but something went wrong during the transfer and only certain parts of his mind went into the computer, leaving the other parts in Hugo's biological mind. Having only half of an actual brain renders him insane and he is put into an asylum until he is later retrieved by Pete and Myka to reverse what the artifact has done, thus making him a whole person again and deleting the holographic and homicidal half version of Hugo in the Warehouse 13 computer systems.
  • The 2014 episode "White Christmas" of the British TV show Black Mirror features a procedure where copies of living subjects' minds are uploaded to "cookies", devices capable of running full brain emulation, and then used for household control jobs, judicial investigation, and criminal sentencing. An operator can also adjust the cookie speed to make the emulated mind experiment a different time scale, a feature used to apply a thousand-year long sentence to an individual's mind, which is served in a few hours of real-world time.
  • In the 2014 episode "Days of Future Future" of the Simpsons, Professor Frink loads Homer's brain onto an USB-Stick and then brings him to life in a digital environment with his head being shown on (the future equivalents of) "TV"-screens, digital photo frames and computer screens between which Homer can move freely and engage in screensavers and video games. Later Bart buys him a "robot body" (similar to the Surrogates in the movie Surrogates) which he plugs into the "TV" upon which it conflates and Homer's head moves from the screen over to the physical robot.
  • The 2016 episode San Junipero of the British TV show Black Mirror.
  • Altered Carbon (2018) is based on the premise that "More than 300 years in the future, society has been transformed by new technology, leading to human bodies being interchangeable and death no longer being permanent."

Comics

  • In the Marvel Comics universe, Adolf Hitler's mind was transferred into a cloned body upon his death; this clone became the supervillain called the Hate-Monger, first introduced in 1963.
  • The 1966 comic book superhero NoMan "was a human mind housed in a robotic body. The mind, that of Anthony Dunn, had been transferred into the robotic form as his human body passed away."
  • In Frank Miller's comic RoboCop Versus The Terminator (1992), the human brain of RoboCop is uploaded into Skynet, the malevolent artificial intelligence from the Terminator series. RoboCop's mind waits hidden inside Skynet for many years until he finally gets an opportunity to strike against it.
  • In Journey Into Mystery (2013) The aliens Beta Ray Bill and Ti Asha Ra as well as his ship Skuttlebutt are all representative uploaded entities. Bill is a cyborg and Ti Asha Ra is created from within the Celestial Galactus himself. In issues #652-55, Skuttlebutt is destroyed, and Ti Asha Ra is killed; however, the ship entity Bill had been chasing is a form of cosmic life collector and partitions Ti Asha Ra's mind to upload Skuttlebutt's consciousness into her physical body, apparently resurrecting her from the dead. It also uploads the life goddess Gaea and Ti Asha Ra into itself, which allows the Asgardian warrior maiden Sif and Bill to rescue them later as all is returned to normal.
  • In Amazing Spider-Man, Otto Octavius was able to house copy of his mind in a robotic body of the Living Brain. After its destruction, Octavius transferred his mind into a clone body and then, into a new clone body of Spider-Man.
  • In DC comics the hero "NoMan" was a 76-year-old man before having his consciousness uploaded.

Video games

  • In the computer game Space Quest IV: Roger Wilco and the Time Rippers (1991) from Sierra Entertainment, the hero Roger Wilco is chased through time by an uploaded version of his old enemy Sludge Vohaul, whose consciousness has been stored on the missing floppies from a never-produced fourth installment of the Leisure Suit Larry series (also made by Sierra).
  • In Delphine Software's game Flashback (1992), the protagonist Conrad Hart discovers that the Morph alien race is plotting to invade Earth. Knowing that the Morphs will erase his memory if they discover that he knows about them, he copies his memory and records a message of himself in his holocube in case if his memory is erased.
  • In the Mega Man X video games (1993–), X's creator Doctor Light had uploaded his brainwaves into a computer before he died, and effectively "lives beyond the grave" as a sentient hologram that can communicate with X and Zero. Additionally, one stage (Cyber Peacock) and the game Mega Man Xtreme involved the protagonists (artificial humans) being uploaded into "cyberspace".
  • In the Mega Man Battle Network series, Hub Hikari, twin brother of protagonist Lan Hikari, was uploaded and configured into the Navi (artificial intelligence) Megaman.EXE to escape a lethal birth defect.
  • In Halo 4, this is the main purpose of the Forerunner device known as the Composer. It digitizes organic intelligences, allowing them to live as AIs. However, the process corrupts the minds that are converted and is irreversible.
  • In Mass Effect 3, Legion (member of a race of Synthetic Intelligences known as the Geth) temporarily uploads Commander Shepard's consciousness into the Geth Consensus, the network that houses all Geth programs.
  • The computer game Independence War (1997), in which the player is assisted by a recreation of CNV-301 Dreadnought's former captain, who is bitter about having been recreated without his consent.
  • In the computer game Total Annihilation (1997), a multi-millennia war rages between a society mandating mind transfer and a rebellion against it.
  • In the Japanese release of Ace Combat 3: Electrosphere (1999), the main antagonist is the result of a mind uploading experiment, which is referred to in the game as "sublimation" after the phase transition.
  • In Metroid Fusion (2002), Samus Aran's commander and friend Adam had his brain uploaded to the Federation's network, a process that is apparently common for scientists and leaders.
  • In the MMO Eve Online (2003), players take the role of pilots for hire known as "capsuleers" or "Empyreans". Through usage of capsule technology, they have their minds downloaded and transferred to a new clone through the galactic network at the moment before death.
  • In the MMO first-person shooter Dust 514, mercenary foot soldiers use a device called a Neural Interface System (NIS) implant to transfer conscientiousness to a clone body at the moment of death.
  • In the computer game City of Heroes (2004–), the arch-villain known as Nemesis was born in Prussia during the 18th century, but has since then put his mind into a complex, steam-powered robotic body.
  • In the video game Jak 3, the character Vin uploads his mind into a computer before he is killed.
  • In the Destroy All Humans! series (2005–), Orthopox 13 uploads a "copy of my [his] exquisite mind" onto a Holopox unit just before his ship is nuked by the KGB.
  • In the games Portal and Portal 2, the character GLaDOS is actually Aperture Science's CEO Cave Johnson's assistant Caroline, transferred into a computer. Cave originally opted for himself to be transferred into a computer, but died before it could happen, and hence Caroline was transferred instead. At the end of Portal, GLaDOS also claims to have Chell's brain "scanned and permanently backed up in case something terrible happens".
  • In the game Dirge of Cerberus: Final Fantasy VII (2006), the character Professor Hojo is revealed to have uploaded his consciousness into the worldwide network moments before his death in the original Final Fantasy VII (1997) as a means to survive the encounter with the protagonists and ultimately download himself into a new, stronger body 3 years later.
  • In the iPhone RPG Chaos Rings (2010), a human named Theia transferred her consciousness and memories into the mainframe of the Ark Arena, a highly advanced spaceship and time travel machine, in order to oversee its activities.
  • In Assassin's Creed: Revelations it turns out that Subject 16 uploaded his mind into the Animus virtual machine shortly before committing suicide in the first game.
  • In Cyborg Justice, a game for the Sega Genesis, the player is uploaded into a robotic body.
  • In the RPG game Harbinger one of the playable characters is uploaded being in a gladiator robotic body, on a generational starship.
  • In the game Deponia the character "Goal" has her personality backed up onto a disc, inserted inside her head.
  • In the thriller game Master Reboot the players' character is uploaded into the "Soul Cloud" upon biological death, where all the data that makes up a persons soul in stored in vast data banks.
  • During the time between story lines of the games Crysis 2 and Crysis 3, the personality of "Alcatraz"—the protagonist of Crysis 2—was effectively supplanted by "Prophets" whose memories and consciousness were embedded in the "nanosuit" that Alcatraz was wearing.
  • In the thriller game SOMA.
  • In the JRPG "Xenoblade Chronicles X", where humans who escaped the Earth's destruction had their consciousnesses recorded and stored inside a database where they can control artificial bodies known as Mimeosomes.
  • In Warframe, the titular Warframe suits are actually biomechanical shells which are connected the conscience of the actual Tenno, human children who were given unpredictable powers by the Void.

Other media

  • In the tabletop game Car Wars (1980) characters' bodies are routinely cloned and their stored memories uploaded into the new bodies, which are activated upon the death of the old versions.
  • In the Rifts role-playing game Dimension Book 2: Phase World (1994), a member of an artificial race called the Machine People named Annie integrates her consciousness permanently with a spacecraft.
  • In the online collaborative world-building project "Orion's Arm" (2000–) the concepts of mind copying and uploading are used extensively, particularly in the e-novel Betrayals.
  • The award-winning RPG Transhuman Space (2002) tackles the mind-uploading issue with the concept of xoxing, which is the illegal perfect copy of a mind. Mind emulation is always destructive, so a living person cannot also exist in a digital form. Nevertheless, this doesn't prevent multiple digital versions from being simultaneously active. Law prohibits more than one active copy of a mind emulation at a time (security backups being considered inactive) and the RPG delves into the possible abuses of this (like cult leaders implanting a copy of their own mind in every cult followers' virtual interface).
  • In the anime Sword Art Online the creator of a virtual reality MMO, Kayaba Akihko, scanned his brain with "high output scan" and uploaded it to the Internet.
  • The RPG Eclipse Phase takes place in a frightening future after a technological singularity in which AIs known as TITANs wiped out most humans and transhumans alive at the time, an event called "The Fall". Most of the survivors live in space, and have uploaded their personalities (or "egos") and can regularly switch between physical bodies ("morphs"), or inhabit simulated bodies ("infomorphs") in virtual environments. Duplication of uploaded personalities is also possible ("forking").

Mind uploading (updated)

From Wikipedia, the free encyclopedia

Whole brain emulation (WBE), mind upload or brain upload (sometimes called "mind copying" or "mind transfer") is the hypothetical futuristic process of scanning the mental state (including long-term memory and "self") of a particular brain substrate and copying it to a computer. The computer could then run a simulation model of the brain's information processing, such that it responds in essentially the same way as the original brain (i.e., indistinguishable from the brain for all relevant purposes) and experiences having a conscious mind.

Mind uploading may potentially be accomplished by either of two methods: Copy-and-transfer or gradual replacement of neurons. In the case of the former method, mind uploading would be achieved by scanning and mapping the salient features of a biological brain, and then by copying, transferring, and storing that information state into a computer system or another computational device. The biological brain may not survive the copying process. The simulated mind could be within a virtual reality or simulated world, supported by an anatomic 3D body simulation model. Alternatively the simulated mind could reside in a computer that is inside (or connected to) a (not necessarily humanoid) robot or a biological body.

Among some futurists and within the transhumanist movement, mind uploading is treated as an important proposed life extension technology. Some believe mind uploading is humanity's current best option for preserving the identity of the species, as opposed to cryonics. Another aim of mind uploading is to provide a permanent backup to our "mind-file", to enable interstellar space travels, and a means for human culture to survive a global disaster by making a functional copy of a human society in a Matrioshka brain, i.e. a computing device that consumes all energy from a star. Whole brain emulation is discussed by some futurists as a "logical endpoint" of the topical computational neuroscience and neuroinformatics fields, both about brain simulation for medical research purposes. It is discussed in artificial intelligence research publications as an approach to strong AI. Computer-based intelligence such as an upload could think much faster than a biological human even if it were no more intelligent. A large-scale society of uploads might, according to futurists, give rise to a technological singularity, meaning a sudden time constant decrease in the exponential development of technology. Mind uploading is a central conceptual feature of numerous science fiction novels and films.

Substantial mainstream research in related areas is being conducted in animal brain mapping and simulation, development of faster supercomputers, virtual reality, brain–computer interfaces, connectomics and information extraction from dynamically functioning brains. According to supporters, many of the tools and ideas needed to achieve mind uploading already exist or are currently under active development; however, they will admit that others are, as yet, very speculative, but still in the realm of engineering possibility. Neuroscientist Randal Koene has formed a nonprofit organization called Carbon Copies to promote mind uploading research.

Overview

Neuron anatomical model
 
Simple artificial neural network

The human brain contains, on average, about 86 billion nerve cells called neurons, each individually linked to other neurons by way of connectors called axons and dendrites. Signals at the junctures (synapses) of these connections are transmitted by the release and detection of chemicals known as neurotransmitters. The established neuroscientific consensus is that the human mind is largely an emergent property of the information processing of this neural network.

Neuroscientists have stated that important functions performed by the mind, such as learning, memory, and consciousness, are due to purely physical and electrochemical processes in the brain and are governed by applicable laws. For example, Christof Koch and Giulio Tononi wrote in IEEE Spectrum:
Consciousness is part of the natural world. It depends, we believe, only on mathematics and logic and on the imperfectly known laws of physics, chemistry, and biology; it does not arise from some magical or otherworldly quality.
The concept of mind uploading is based on this mechanistic view of the mind, and denies the vitalist view of human life and consciousness.

Eminent computer scientists and neuroscientists have predicted that specially programmed computers will be capable of thought and even attain consciousness, including Koch and Tononi, Douglas Hofstadter, Jeff Hawkins, Marvin Minsky, Randal A. Koene, and Rodolfo Llinás.

However, even though uploading is dependent upon such a general capability, it is conceptually distinct from general forms of AI in that it results from dynamic reanimation of information derived from a specific human mind so that the mind retains a sense of historical identity (other forms are possible but would compromise or eliminate the life-extension feature generally associated with uploading). The transferred and reanimated information would become a form of artificial intelligence, sometimes called an infomorph or "noömorph".

Many theorists have presented models of the brain and have established a range of estimates of the amount of computing power needed for partial and complete simulations. Using these models, some have estimated that uploading may become possible within decades if trends such as Moore's law continue.

Theoretical benefits and applications

"Immortality" or backup

In theory, if the information and processes of the mind can be disassociated from the biological body, they are no longer tied to the individual limits and lifespan of that body. Furthermore, information within a brain could be partly or wholly copied or transferred to one or more other substrates (including digital storage or another brain), thereby – from a purely mechanistic perspective – reducing or eliminating "mortality risk" of such information. This general proposal was discussed in 1971 by biogerontologist George M. Martin of the University of Washington.

Space exploration

An “uploaded astronaut” could be used instead of a "live" astronaut in human spaceflight, avoiding the perils of zero gravity, the vacuum of space, and cosmic radiation to the human body. It would allow for the use of smaller spacecraft, such as the proposed StarChip, and it would enable virtually unlimited interstellar travel distances.

Relevant technologies and techniques

The focus of mind uploading, in the case of copy-and-transfer, is on data acquisition, rather than data maintenance of the brain. A set of approaches known as loosely coupled off-loading (LCOL) may be used in the attempt to characterize and copy the mental contents of a brain. The LCOL approach may take advantage of self-reports, life-logs and video recordings that can be analyzed by artificial intelligence. A bottom-up approach may focus on the specific resolution and morphology of neurons, the spike times of neurons, the times at which neurons produce action potential responses.

Computational complexity

Estimates of how much processing power is needed to emulate a human brain at various levels (from Ray Kurzweil and the chart to the left), along with the fastest supercomputer from TOP500 mapped by year. Note the logarithmic scale and exponential trendline, which assumes the computational capacity doubles every 1.1 years. Kurzweil believes that mind uploading will be possible at neural simulation, while the Sandberg, Bostrom report is less certain about where consciousness arises.
 
Advocates of mind uploading point to Moore's law to support the notion that the necessary computing power is expected to become available within a few decades. However, the actual computational requirements for running an uploaded human mind are very difficult to quantify, potentially rendering such an argument specious.

Regardless of the techniques used to capture or recreate the function of a human mind, the processing demands are likely to be immense, due to the large number of neurons in the human brain along with the considerable complexity of each neuron.

In 2004, Henry Markram, lead researcher of the "Blue Brain Project", stated that "it is not [their] goal to build an intelligent neural network", based solely on the computational demands such a project would have.
It will be very difficult because, in the brain, every molecule is a powerful computer and we would need to simulate the structure and function of trillions upon trillions of molecules as well as all the rules that govern how they interact. You would literally need computers that are trillions of times bigger and faster than anything existing today.
Five years later, after successful simulation of part of a rat brain, Markram was much more bold and optimistic. In 2009, as director of the Blue Brain Project, he claimed that “A detailed, functional artificial human brain can be built within the next 10 years.”

Required computational capacity strongly depend on the chosen level of simulation model scale.

Level CPU demand
(FLOPS)
Memory demand
(Tb)
$1 million super‐computer
(Earliest year of making)
Analog network population model 1015 102 2008
Spiking neural network 1018 104 2019
Electrophysiology 1022 104 2033
Metabolome 1025 106 2044
Proteome 1026 107 2048
States of protein complexes 1027 108 2052
Distribution of complexes 1030 109 2063
Stochastic behavior of single molecules 1043 1014 2111
Estimates from Sandberg, Bostrom, 2008

Simulation model scale

A high-level cognitive AI model of the brain architecture is not required for brain emulation
 
Simple neuron model: Black-box dynamic non-linear signal processing system
 
Metabolism model: The movement of positively charged ions through the ion channels controls the membrane electrical action potential in an axon.

Since the function of the human mind and how it might arise from the working of the brain's neural network, are poorly understood issues, mind uploading relies on the idea of neural network emulation. Rather than having to understand the high-level psychological processes and large-scale structures of the brain, and model them using classical artificial intelligence methods and cognitive psychology models, the low-level structure of the underlying neural network is captured, mapped and emulated with a computer system. In computer science terminology, rather than analyzing and reverse engineering the behavior of the algorithms and data structures that resides in the brain, a blueprint of its source code is translated to another programming language. The human mind and the personal identity then, theoretically, is generated by the emulated neural network in an identical fashion to it being generated by the biological neural network.

On the other hand, a molecule-scale simulation of the brain is not expected to be required, provided that the functioning of the neurons is not affected by quantum mechanical processes. The neural network emulation approach only requires that the functioning and interaction of neurons and synapses are understood. It is expected that it is sufficient with a black-box signal processing model of how the neurons respond to nerve impulses (electrical as well as chemical synaptic transmission).

A sufficiently complex and accurate model of the neurons is required. A traditional artificial neural network model, for example multi-layer perceptron network model, is not considered as sufficient. A dynamic spiking neural network model is required, which reflects that the neuron fires only when a membrane potential reaches a certain level. It is likely that the model must include delays, non-linear functions and differential equations describing the relation between electrophysical parameters such as electrical currents, voltages, membrane states (ion channel states) and neuromodulators.

Since learning and long-term memory are believed to result from strengthening or weakening the synapses via a mechanism known as synaptic plasticity or synaptic adaptation, the model should include this mechanism. The response of sensory receptors to various stimuli must also be modelled.
Furthermore, the model may have to include metabolism, i.e. how the neurons are affected by hormones and other chemical substances that may cross the blood–brain barrier. It is considered likely that the model must include currently unknown neuromodulators, neurotransmitters and ion channels. It is considered unlikely that the simulation model has to include protein interaction, which would make it computationally complex.

A digital computer simulation model of an analog system such as the brain is an approximation that introduces random quantization errors and distortion. However, the biological neurons also suffer from randomness and limited precision, for example due to background noise. The errors of the discrete model can be made smaller than the randomness of the biological brain by choosing a sufficiently high variable resolution and sample rate, and sufficiently accurate models of non-linearities. The computational power and computer memory must however be sufficient to run such large simulations, preferably in real time.

Scanning and mapping scale of an individual

When modelling and simulating the brain of a specific individual, a brain map or connectivity database showing the connections between the neurons must be extracted from an anatomic model of the brain. For whole brain simulation, this network map should show the connectivity of the whole nervous system, including the spinal cord, sensory receptors, and muscle cells. Destructive scanning of a small sample of tissue from a mouse brain including synaptic details is possible as of 2010.

However, if short-term memory and working memory include prolonged or repeated firing of neurons, as well as intra-neural dynamic processes, the electrical and chemical signal state of the synapses and neurons may be hard to extract. The uploaded mind may then perceive a memory loss of the events and mental processes immediately before the time of brain scanning.

A full brain map has been estimated to occupy less than 2 x 1016 bytes (20,000 TB) and would store the addresses of the connected neurons, the synapse type and the synapse "weight" for each of the brains' 1015 synapses. However, the biological complexities of true brain function (e.g. the epigenetic states of neurons, protein components with multiple functional states, etc.) may preclude an accurate prediction of the volume of binary data required to faithfully represent a functioning human mind.

Serial sectioning

Serial sectioning of a brain

A possible method for mind uploading is serial sectioning, in which the brain tissue and perhaps other parts of the nervous system are frozen and then scanned and analyzed layer by layer, which for frozen samples at nano-scale requires a cryo-ultramicrotome, thus capturing the structure of the neurons and their interconnections. The exposed surface of frozen nerve tissue would be scanned and recorded, and then the surface layer of tissue removed. While this would be a very slow and labor-intensive process, research is currently underway to automate the collection and microscopy of serial sections. The scans would then be analyzed, and a model of the neural net recreated in the system that the mind was being uploaded into.

There are uncertainties with this approach using current microscopy techniques. If it is possible to replicate neuron function from its visible structure alone, then the resolution afforded by a scanning electron microscope would suffice for such a technique. However, as the function of brain tissue is partially determined by molecular events (particularly at synapses, but also at other places on the neuron's cell membrane), this may not suffice for capturing and simulating neuron functions. It may be possible to extend the techniques of serial sectioning and to capture the internal molecular makeup of neurons, through the use of sophisticated immunohistochemistry staining methods that could then be read via confocal laser scanning microscopy. However, as the physiological genesis of 'mind' is not currently known, this method may not be able to access all of the necessary biochemical information to recreate a human brain with sufficient fidelity.

Brain imaging

Process from MRI acquisition to whole brain structural network
 
It may be possible to create functional 3D maps of the brain activity, using advanced neuroimaging technology, such as functional MRI (fMRI, for mapping change in blood flow), magnetoencephalography (MEG, for mapping of electrical currents), or combinations of multiple methods, to build a detailed three-dimensional model of the brain using non-invasive and non-destructive methods. Today, fMRI is often combined with MEG for creating functional maps of human cortex during more complex cognitive tasks, as the methods complement each other. Even though current imaging technology lacks the spatial resolution needed to gather the information needed for such a scan, important recent and future developments are predicted to substantially improve both spatial and temporal resolutions of existing technologies.

Brain simulation

There is ongoing work in the field of brain simulation, including partial and whole simulations of some animals. For example, the C. elegans roundworm, Drosophila fruit fly, and mouse have all been simulated to various degrees.

The Blue Brain Project by the Brain and Mind Institute of the École Polytechnique Fédérale de Lausanne, Switzerland is an attempt to create a synthetic brain by reverse-engineering mammalian brain circuitry.

Issues

Philosophical issues

Underlying the concept of "mind uploading" (more accurately "mind transferring") is the broad philosophy that consciousness lies within the brain's information processing and is in essence an emergent feature that arises from large neural network high-level patterns of organization, and that the same patterns of organization can be realized in other processing devices. Mind uploading also relies on the idea that the human mind (the "self" and the long-term memory), just like non-human minds, is represented by the current neural network paths and the weights of the brain synapses rather than by a dualistic and mystic soul and spirit. The mind or "soul" can be defined as the information state of the brain, and is immaterial only in the same sense as the information content of a data file or the state of a computer software currently residing in the work-space memory of the computer. Data specifying the information state of the neural network can be captured and copied as a "computer file" from the brain and re-implemented into a different physical form. This is not to deny that minds are richly adapted to their substrates. An analogy to the idea of mind uploading is to copy the temporary information state (the variable values) of a computer program from the computer memory to another computer and continue its execution. The other computer may perhaps have different hardware architecture but emulates the hardware of the first computer.

These issues have a long history. In 1775 Thomas Reid wrote: “I would be glad to know... whether when my brain has lost its original structure, and when some hundred years after the same materials are fabricated so curiously as to become an intelligent being, whether, I say that being will be me; or, if, two or three such beings should be formed out of my brain; whether they will all be me, and consequently one and the same intelligent being.”

A considerable portion of transhumanists and singularitarians place great hope into the belief that they may become immortal, by creating one or many non-biological functional copies of their brains, thereby leaving their "biological shell". However, the philosopher and transhumanist Susan Schneider claims that at best, uploading would create a copy of the original person's mind. Susan Schneider agrees that consciousness has a computational basis, but this does not mean we can upload and survive. According to her views, "uploading" would probably result in the death of the original person's brain, while only outside observers can maintain the illusion of the original person still being alive. For it is implausible to think that one's consciousness would leave one's brain and travel to a remote location; ordinary physical objects do not behave this way. Ordinary objects (rocks, tables, etc.) are not simultaneously here, and elsewhere. At best, a copy of the original mind is created. Neural correlates of consciousness, a sub-branch of neuroscience, states that consciousness may be thought of as a state-dependent property of some undefined complex, adaptive, and highly interconnected biological system.

Others have argued against such conclusions. For example, Buddhist transhumanist James Hughes has pointed out that this consideration only goes so far: if one believes the self is an illusion, worries about survival are not reasons to avoid uploading, and Keith Wiley has presented an argument wherein all resulting minds of an uploading procedure are granted equal primacy in their claim to the original identity, such that survival of the self is determined retroactively from a strictly subjective position. Some have also asserted that consciousness is a part of an extra-biological system that is yet to be discovered and cannot be fully understood under the present constraints of neurobiology. Without the transference of consciousness, true mind-upload or perpetual immortality cannot be practically achieved.

Another potential consequence of mind uploading is that the decision to "upload" may then create a mindless symbol manipulator instead of a conscious mind (see philosophical zombie). Are we to assume that an upload is conscious if it displays behaviors that are highly indicative of consciousness? Are we to assume that an upload is conscious if it verbally insists that it is conscious? Could there be an absolute upper limit in processing speed above which consciousness cannot be sustained? The mystery of consciousness precludes a definitive answer to this question. Numerous scientists, including Kurzweil, strongly believe that determining whether a separate entity is conscious (with 100% confidence) is fundamentally unknowable, since consciousness is inherently subjective. Regardless, some scientists strongly believe consciousness is the consequence of computational processes which are substrate-neutral. On the contrary, numerous scientists believe consciousness may be the result of some form of quantum computation dependent on substrate.

In light of uncertainty on whether to regard uploads as conscious, Sandberg proposes a cautious approach:
Principle of assuming the most (PAM): Assume that any emulated system could have the same mental properties as the original system and treat it correspondingly.

Verification issues

It is argued that if a computational copy of one's mind did exist, it would be impossible for one to verify this. The argument for this stance is the following: for a computational mind to recognize an emulation of itself, it must be capable of deciding whether two Turing machines (namely, itself and the proposed emulation) are functionally equivalent. This task is uncomputable due to the undecidability of equivalence, thus there cannot exist a computational procedure in the mind that is capable of recognizing an emulation of itself.

Ethical and legal implications

The process of developing emulation technology raises ethical issues related to animal welfare and artificial consciousness. The neuroscience required to develop brain emulation would require animal experimentation, first on invertebrates and then on small mammals before moving on to humans. Sometimes the animals would just need to be euthanized in order to extract, slice, and scan their brains, but sometimes behavioral and in vivo measures would be required, which might cause pain to living animals.

In addition, the resulting animal emulations themselves might suffer, depending on one's views about consciousness. Bancroft argues for the plausibility of consciousness in brain simulations on the basis of the "fading qualia" thought experiment of David Chalmers. He then concludes: “If, as I argue above, a sufficiently detailed computational simulation of the brain is potentially operationally equivalent to an organic brain, it follows that we must consider extending protections against suffering to simulations.”

It might help reduce emulation suffering to develop virtual equivalents of anaesthesia, as well as to omit processing related to pain and/or consciousness. However, some experiments might require a fully functioning and suffering animal emulation. Animals might also suffer by accident due to flaws and lack of insight into what parts of their brains are suffering. Questions also arise regarding the moral status of partial brain emulations, as well as creating neuromorphic emulations that draw inspiration from biological brains but are built somewhat differently.

Brain emulations could be erased by computer viruses or malware, without need to destroy the underlying hardware. This may make assassination easier than for physical humans. The attacker might take the computing power for its own use.

Many questions arise regarding the legal personhood of emulations. Would they be given the rights of biological humans? If a person makes an emulated copy of themselves and then dies, does the emulation inherit their property and official positions? Could the emulation ask to "pull the plug" when its biological version was terminally ill or in a coma? Would it help to treat emulations as adolescents for a few years so that the biological creator would maintain temporary control? Would criminal emulations receive the death penalty, or would they be given forced data modification as a form of "rehabilitation"? Could an upload have marriage and child-care rights?

If simulated minds would come true and if they were assigned rights of their own, it may be difficult to ensure the protection of "digital human rights". For example, social science researchers might be tempted to secretly expose simulated minds, or whole isolated societies of simulated minds, to controlled experiments in which many copies of the same minds are exposed (serially or simultaneously) to different test conditions.

Political and economic implications

Emulations could create a number of conditions that might increase risk of war, including inequality, changes of power dynamics, a possible technological arms race to build emulations first, first-strike advantages, strong loyalty and willingness to "die" among emulations, and triggers for racist, xenophobic, and religious prejudice. If emulations run much faster than humans, there might not be enough time for human leaders to make wise decisions or negotiate. It is possible that humans would react violently against growing power of emulations, especially if they depress human wages. Emulations may not trust each other, and even well-intentioned defensive measures might be interpreted as offense.

Emulation timelines and AI risk

There are very few feasible technologies that humans have refrained from developing. The neuroscience and computer-hardware technologies that may make brain emulation possible are widely desired for other reasons, and logically their development will continue into the future. Assuming that emulation technology will arrive, a question becomes whether we should accelerate or slow its advance.

Arguments for speeding up brain-emulation research:
  • If neuroscience is the bottleneck on brain emulation rather than computing power, emulation advances may be more erratic and unpredictable based on when new scientific discoveries happen. Limited computing power would mean the first emulations would run slower and so would be easier to adapt to, and there would be more time for the technology to transition through society;
  • Improvements in manufacturing, 3D printing, and nanotechnology may accelerate hardware production, which could increase the "computing overhang" from excess hardware relative to neuroscience;
  • If one AI-development group had a lead in emulation technology, it would have more subjective time to win an arms race to build the first superhuman AI. Because it would be less rushed, it would have more freedom to consider AI risks.
Arguments for slowing down brain-emulation research:
  • Greater investment in brain emulation and associated cognitive science might enhance the ability of artificial intelligence (AI) researchers to create "neuromorphic" (brain-inspired) algorithms, such as neural networks, reinforcement learning, and hierarchical perception. This could accelerate risks from uncontrolled AI. Participants at a 2011 AI workshop estimated an 85% probability that neuromorphic AI would arrive before brain emulation. This was based on the idea that brain emulation would require understanding some brain components, and it would be easier to tinker with these than to reconstruct the entire brain in its original form. By a very narrow margin, the participants on balance leaned toward the view that accelerating brain emulation would increase expected AI risk;
  • Waiting might give society more time to think about the consequences of brain emulation and develop institutions to improve cooperation.
Emulation research would also speed up neuroscience as a whole, which might accelerate medical advances, cognitive enhancement, lie detectors, and capability for psychological manipulation.

Emulations might be easier to control than de novo AI because
  1. We understand better human abilities, behavioral tendencies, and vulnerabilities, so control measures might be more intuitive and easier to plan for;
  2. Emulations could more easily inherit human motivations;
  3. Emulations are harder to manipulate than de novo AI, because brains are messy and complicated; this could reduce risks of their rapid takeoff. Also, emulations may be bulkier and require more hardware than AI, which would also slow the speed of a transition. Unlike AI, an emulation wouldn't be able to rapidly expand beyond the size of a human brain. Emulations running at digital speeds would have less intelligence differential vis-à-vis AI and so might more easily control AI.
As counterpoint to these considerations, Bostrom notes some downsides:
  • Even if we better understand human behavior, the evolution of emulation behavior under self-improvement might be much less predictable than the evolution of safe de novo AI under self-improvement;
  • Emulations may not inherit all human motivations. Perhaps they would inherit our darker motivations or would behave abnormally in the unfamiliar environment of cyberspace;
  • Even if there's a slow takeoff toward emulations, there would still be a second transition to de novo AI later on. Two intelligence explosions may mean more total risk.

Advocates

Ray Kurzweil, director of engineering at Google, claims to know and foresee that people will be able to "upload" their entire brains to computers and become "digitally immortal" by 2045. Kurzweil made this claim for many years, e.g. during his speech in 2013 at the Global Futures 2045 International Congress in New York, which claims to subscribe to a similar set of beliefs. Mind uploading is also advocated by a number of researchers in neuroscience and artificial intelligence, such as Marvin Minsky while he was still alive. In 1993, Joe Strout created a small web site called the Mind Uploading Home Page, and began advocating the idea in cryonics circles and elsewhere on the net. That site has not been actively updated in recent years, but it has spawned other sites including MindUploading.org, run by Randal A. Koene, who also moderates a mailing list on the topic. These advocates see mind uploading as a medical procedure which could eventually save countless lives.

Many transhumanists look forward to the development and deployment of mind uploading technology, with transhumanists such as Nick Bostrom predicting that it will become possible within the 21st century due to technological trends such as Moore's law.

Michio Kaku, in collaboration with Science, hosted a documentary, Sci Fi Science: Physics of the Impossible, based on his book Physics of the Impossible.  Episode four, titled "How to Teleport", mentions that mind uploading via techniques such as quantum entanglement and whole brain emulation using an advanced MRI machine may enable people to be transported to vast distances at near light-speed.

The book Beyond Humanity: CyberEvolution and Future Minds by Gregory S. Paul & Earl D. Cox, is about the eventual (and, to the authors, almost inevitable) evolution of computers into sentient beings, but also deals with human mind transfer. Richard Doyle's Wetwares: Experiments in PostVital Living deals extensively with uploading from the perspective of distributed embodiment, arguing for example that humans are currently part of the "artificial life phenotype". Doyle's vision reverses the polarity on uploading, with artificial life forms such as uploads actively seeking out biological embodiment as part of their reproductive strategy.

Skeptics

Kenneth D. Miller, a professor of neuroscience at Columbia and a co-director of the Center for Theoretical Neuroscience, raised doubts about the practicality of mind uploading. His major argument is that reconstructing neurons and their connections is in itself a formidable task, but it is far from being sufficient. Operation of the brain depends on the dynamics of electrical and biochemical signal exchange between neurons; therefore, capturing them in a single "frozen" state may prove insufficient. In addition, the nature of these signals may require modeling down to the molecular level and beyond. Therefore, while not rejecting the idea in principle, Miller believes that the complexity of the "absolute" duplication of an individual mind is insurmountable for the nearest hundreds of years.

Operator (computer programming)

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