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Wednesday, July 6, 2022

Francium

From Wikipedia, the free encyclopedia
 
Francium, 87Fr
Francium
Pronunciation/ˈfrænsiəm/ (FRAN-see-əm)
Mass number[223]
Francium in the periodic table
Hydrogen
Helium
Lithium Beryllium
Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium
Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium
Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium

Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
Cs

Fr

(Uue)
radonfranciumradium
Atomic number (Z)87
Groupgroup 1: hydrogen and alkali metals
Periodperiod 7
Block  s-block
Electron configuration[Rn] 7s1
Electrons per shell2, 8, 18, 32, 18, 8, 1
Physical properties
Phase at STPsolid
Melting point300 K ​(27 °C, ​81 °F)
Boiling point950 K ​(677 °C, ​1251 °F)
Density (near r.t.)2.48 g/cm3 (estimated)
Vapor pressure (extrapolated)
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 404 454 519 608 738 946
Atomic properties
Oxidation states+1 (a strongly basic oxide)
ElectronegativityPauling scale: >0.79
Ionization energies
  • 1st: 393 kJ/mol

Covalent radius260 pm (extrapolated)
Van der Waals radius348 pm (extrapolated)
Other properties
Natural occurrencefrom decay
Crystal structurebody-centered cubic (bcc)
Body-centered cubic crystal structure for francium

(extrapolated)
Thermal conductivity15 W/(m⋅K) (extrapolated)
Electrical resistivity3 µΩ⋅m (calculated)
Magnetic orderingParamagnetic
CAS Number7440-73-5
History
Namingafter France, homeland of the discoverer
Discovery and first isolationMarguerite Perey (1939)
Main isotopes of francium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct
212Fr syn 20.0 min β+ 212Rn
α 208At
221Fr trace 4.8 min α 217At
222Fr syn 14.2 min β 222Ra
223Fr trace 22.00 min β 223Ra
α 219At

Francium is a chemical element with the symbol Fr and atomic number 87. It is extremely radioactive; its most stable isotope, francium-223 (originally called actinium K after the natural decay chain it appears in), has a half-life of only 22 minutes. It is the second-most electropositive element, behind only caesium, and is the second rarest naturally occurring element (after astatine). The isotopes of francium decay quickly into astatine, radium, and radon. The electronic structure of a francium atom is [Rn] 7s1, and so the element is classed as an alkali metal.

Bulk francium has never been seen. Because of the general appearance of the other elements in its periodic table column, it is presumed that francium would appear as a highly reactive metal, if enough could be collected together to be viewed as a bulk solid or liquid. Obtaining such a sample is highly improbable, since the extreme heat of decay resulting from its short half-life would immediately vaporize any viewable quantity of the element.

Francium was discovered by Marguerite Perey in France (from which the element takes its name) in 1939. Prior to its discovery, it was referred to as eka-caesium or ekacaesium because of its conjectured existence below caesium in the periodic table. It was the last element first discovered in nature, rather than by synthesis. Outside the laboratory, francium is extremely rare, with trace amounts found in uranium and thorium ores, where the isotope francium-223 continually forms and decays. As little as 20–30 g (one ounce) exists at any given time throughout the Earth's crust; aside from francium-221, its other isotopes are entirely synthetic. The largest amount produced in the laboratory was a cluster of more than 300,000 atoms.

Characteristics

Francium is one of the most unstable of the naturally occurring elements: its longest-lived isotope, francium-223, has a half-life of only 22 minutes. The only comparable element is astatine, whose most stable natural isotope, astatine-219 (the alpha daughter of francium-223), has a half-life of 56 seconds, although synthetic astatine-210 is much longer-lived with a half-life of 8.1 hours. All isotopes of francium decay into astatine, radium, or radon. Francium-223 also has a shorter half-life than the longest-lived isotope of each synthetic element up to and including element 105, dubnium.

Francium is an alkali metal whose chemical properties mostly resemble those of caesium. A heavy element with a single valence electron, it has the highest equivalent weight of any element. Liquid francium—if created—should have a surface tension of 0.05092 N/m at its melting point. Francium's melting point was estimated to be around 8.0 °C (46.4 °F); a value of 27 °C (81 °F) is also often encountered. The melting point is uncertain because of the element's extreme rarity and radioactivity; a different extrapolation based on Dmitri Mendeleev's method gave 20 ± 1.5 °C (68.0 ± 2.7 °F). The estimated boiling point of 620 °C (1,148 °F) is also uncertain; the estimates 598 °C (1,108 °F) and 677 °C (1,251 °F), as well as the extrapolation from Mendeleev's method of 640 °C (1,184 °F), have also been suggested. The density of francium is expected to be around 2.48 g/cm3 (Mendeleev's method extrapolates 2.4 g/cm3).

Linus Pauling estimated the electronegativity of francium at 0.7 on the Pauling scale, the same as caesium; the value for caesium has since been refined to 0.79, but there are no experimental data to allow a refinement of the value for francium. Francium has a slightly higher ionization energy than caesium, 392.811(4) kJ/mol as opposed to 375.7041(2) kJ/mol for caesium, as would be expected from relativistic effects, and this would imply that caesium is the less electronegative of the two. Francium should also have a higher electron affinity than caesium and the Fr ion should be more polarizable than the Cs ion.

Compounds

Due to francium being very unstable, its salts are only known to a small extent. Francium coprecipitates with several caesium salts, such as caesium perchlorate, which results in small amounts of francium perchlorate. This coprecipitation can be used to isolate francium, by adapting the radiocaesium coprecipitation method of Lawrence E. Glendenin and C. M. Nelson. It will additionally coprecipitate with many other caesium salts, including the iodate, the picrate, the tartrate (also rubidium tartrate), the chloroplatinate, and the silicotungstate. It also coprecipitates with silicotungstic acid, and with perchloric acid, without another alkali metal as a carrier, which leads to other methods of separation.

Francium perchlorate

Francium perchlorate is produced by the reaction of francium chloride and sodium perchlorate. The francium perchlorate coprecipitates with caesium perchlorate. This coprecipitation can be used to isolate francium, by adapting the radiocaesium coprecipitation method of Lawrence E. Glendenin and C. M. Nelson. However, this method is unreliable in separating thallium, which also coprecipitates with caesium. Francium perchlorate's entropy is expected to be 42.7 e.u.

Francium halides

Francium halides are all soluble in water and are expected to be white solids. They are expected to be produced by the reaction of the corresponding halides. For example, francium chloride would be produced by the reaction of francium and chlorine. Francium chloride has been studied as a pathway to separate francium from other elements, by using the high vapour pressure of the compound, although francium fluoride would have a higher vapour pressure.

Other compounds

Francium nitrate, sulfate, hydroxide, carbonate, acetate, and oxalate, are all soluble in water, while the iodate, picrate, tartrate, chloroplatinate, and silicotungstate are insoluble. The insolubility of these compounds are used to extract francium from other radioactive products, such as zirconium, niobium, molybdenum, tin, antimony, the method mentioned in the section above. The CsFr molecule is predicted to have francium at the negative end of the dipole, unlike all known heterodiatomic alkali metal molecules. Francium superoxide (FrO2) is expected to have a more covalent character than its lighter congeners; this is attributed to the 6p electrons in francium being more involved in the francium–oxygen bonding.

The only double salt known of francium has the formula Fr9Bi2I9.

Isotopes

There are 34 known isotopes of francium ranging in atomic mass from 199 to 232. Francium has seven metastable nuclear isomers. Francium-223 and francium-221 are the only isotopes that occur in nature, with the former being far more common.

Francium-223 is the most stable isotope, with a half-life of 21.8 minutes, and it is highly unlikely that an isotope of francium with a longer half-life will ever be discovered or synthesized. Francium-223 is a fifth product of the uranium-235 decay series as a daughter isotope of actinium-227; thorium-227 is the more common daughter. Francium-223 then decays into radium-223 by beta decay (1.149 MeV decay energy), with a minor (0.006%) alpha decay path to astatine-219 (5.4 MeV decay energy).

Francium-221 has a half-life of 4.8 minutes. It is the ninth product of the neptunium decay series as a daughter isotope of actinium-225. Francium-221 then decays into astatine-217 by alpha decay (6.457 MeV decay energy).

The least stable ground state isotope is francium-215, with a half-life of 0.12 μs: it undergoes a 9.54 MeV alpha decay to astatine-211. Its metastable isomer, francium-215m, is less stable still, with a half-life of only 3.5 ns.

Applications

Due to its instability and rarity, there are no commercial applications for francium. It has been used for research purposes in the fields of chemistry and of atomic structure. Its use as a potential diagnostic aid for various cancers has also been explored, but this application has been deemed impractical.

Francium's ability to be synthesized, trapped, and cooled, along with its relatively simple atomic structure, has made it the subject of specialized spectroscopy experiments. These experiments have led to more specific information regarding energy levels and the coupling constants between subatomic particles. Studies on the light emitted by laser-trapped francium-210 ions have provided accurate data on transitions between atomic energy levels which are fairly similar to those predicted by quantum theory.

History

As early as 1870, chemists thought that there should be an alkali metal beyond caesium, with an atomic number of 87. It was then referred to by the provisional name eka-caesium. Research teams attempted to locate and isolate this missing element, and at least four false claims were made that the element had been found before an authentic discovery was made.

Erroneous and incomplete discoveries

Soviet chemist Dmitry Dobroserdov was the first scientist to claim to have found eka-caesium, or francium. In 1925, he observed weak radioactivity in a sample of potassium, another alkali metal, and incorrectly concluded that eka-caesium was contaminating the sample (the radioactivity from the sample was from the naturally occurring potassium radioisotope, potassium-40). He then published a thesis on his predictions of the properties of eka-caesium, in which he named the element russium after his home country. Shortly thereafter, Dobroserdov began to focus on his teaching career at the Polytechnic Institute of Odessa, and he did not pursue the element further.

The following year, English chemists Gerald J. F. Druce and Frederick H. Loring analyzed X-ray photographs of manganese(II) sulfate. They observed spectral lines which they presumed to be of eka-caesium. They announced their discovery of element 87 and proposed the name alkalinium, as it would be the heaviest alkali metal.

In 1930, Fred Allison of the Alabama Polytechnic Institute claimed to have discovered element 87 (in addition to 85) when analyzing pollucite and lepidolite using his magneto-optical machine. Allison requested that it be named virginium after his home state of Virginia, along with the symbols Vi and Vm. In 1934, H.G. MacPherson of UC Berkeley disproved the effectiveness of Allison's device and the validity of his discovery.

In 1936, Romanian physicist Horia Hulubei and his French colleague Yvette Cauchois also analyzed pollucite, this time using their high-resolution X-ray apparatus. They observed several weak emission lines, which they presumed to be those of element 87. Hulubei and Cauchois reported their discovery and proposed the name moldavium, along with the symbol Ml, after Moldavia, the Romanian province where Hulubei was born. In 1937, Hulubei's work was criticized by American physicist F. H. Hirsh Jr., who rejected Hulubei's research methods. Hirsh was certain that eka-caesium would not be found in nature, and that Hulubei had instead observed mercury or bismuth X-ray lines. Hulubei insisted that his X-ray apparatus and methods were too accurate to make such a mistake. Because of this, Jean Baptiste Perrin, Nobel Prize winner and Hulubei's mentor, endorsed moldavium as the true eka-caesium over Marguerite Perey's recently discovered francium. Perey took pains to be accurate and detailed in her criticism of Hulubei's work, and finally she was credited as the sole discoverer of element 87. All other previous purported discoveries of element 87 were ruled out due to francium's very limited half-life.

Perey's analysis

Eka-caesium was discovered on January 7, 1939, by Marguerite Perey of the Curie Institute in Paris, when she purified a sample of actinium-227 which had been reported to have a decay energy of 220 keV. Perey noticed decay particles with an energy level below 80 keV. Perey thought this decay activity might have been caused by a previously unidentified decay product, one which was separated during purification, but emerged again out of the pure actinium-227. Various tests eliminated the possibility of the unknown element being thorium, radium, lead, bismuth, or thallium. The new product exhibited chemical properties of an alkali metal (such as coprecipitating with caesium salts), which led Perey to believe that it was element 87, produced by the alpha decay of actinium-227. Perey then attempted to determine the proportion of beta decay to alpha decay in actinium-227. Her first test put the alpha branching at 0.6%, a figure which she later revised to 1%.

Perey named the new isotope actinium-K (it is now referred to as francium-223) and in 1946, she proposed the name catium (Cm) for her newly discovered element, as she believed it to be the most electropositive cation of the elements. Irène Joliot-Curie, one of Perey's supervisors, opposed the name due to its connotation of cat rather than cation; furthermore, the symbol coincided with that which had since been assigned to curium. Perey then suggested francium, after France. This name was officially adopted by the International Union of Pure and Applied Chemistry (IUPAC) in 1949, becoming the second element after gallium to be named after France. It was assigned the symbol Fa, but this abbreviation was revised to the current Fr shortly thereafter. Francium was the last element discovered in nature, rather than synthesized, following hafnium and rhenium. Further research into francium's structure was carried out by, among others, Sylvain Lieberman and his team at CERN in the 1970s and 1980s.

Occurrence

A shiny gray 5-centimeter piece of matter with a rough surface.
This sample of uraninite contains about 100,000 atoms (3.3×10−20 g) of francium-223 at any given time.

223Fr is the result of the alpha decay of 227Ac and can be found in trace amounts in uranium minerals. In a given sample of uranium, there is estimated to be only one francium atom for every 1 × 1018 uranium atoms. It is also calculated that there is a total mass of at most 30 g of francium in the Earth's crust at any given time.

Production

Francium can be synthesized by a fusion reaction when a gold-197 target is bombarded with a beam of oxygen-18 atoms from a linear accelerator in a process originally developed at the physics department of the State University of New York at Stony Brook in 1995. Depending on the energy of the oxygen beam, the reaction can yield francium isotopes with masses of 209, 210, and 211.

197Au + 18O → 209Fr + 6 n
197Au + 18O → 210Fr + 5 n
197Au + 18O → 211Fr + 4 n
A complex experimental setup featuring a horizontal glass tube placed between two copper coils.
A magneto-optical trap, which can hold neutral francium atoms for short periods of time.

The francium atoms leave the gold target as ions, which are neutralized by collision with yttrium and then isolated in a magneto-optical trap (MOT) in a gaseous unconsolidated state. Although the atoms only remain in the trap for about 30 seconds before escaping or undergoing nuclear decay, the process supplies a continual stream of fresh atoms. The result is a steady state containing a fairly constant number of atoms for a much longer time. The original apparatus could trap up to a few thousand atoms, while a later improved design could trap over 300,000 at a time. Sensitive measurements of the light emitted and absorbed by the trapped atoms provided the first experimental results on various transitions between atomic energy levels in francium. Initial measurements show very good agreement between experimental values and calculations based on quantum theory. The research project using this production method relocated to TRIUMF in 2012, where over 106 francium atoms have been held at a time, including large amounts of 209Fr in addition to 207Fr and 221Fr.

Other synthesis methods include bombarding radium with neutrons, and bombarding thorium with protons, deuterons, or helium ions.

223Fr can also be isolated from samples of its parent 227Ac, the francium being milked via elution with NH4Cl–CrO3 from an actinium-containing cation exchanger and purified by passing the solution through a silicon dioxide compound loaded with barium sulfate.

A round ball of red light surrounded by a green glow
Image of light emitted by a sample of 200,000 francium atoms in a magneto-optical trap
 
A small white spot in the middle surrounded by a red circle. There is a yellow ring outside the red circle, a green circle beyond the yellow ring and a blue circle surrounding all the other circles.
Heat image of 300,000 francium atoms in a magneto-optical trap, around 13 nanograms

In 1996, the Stony Brook group trapped 3000 atoms in their MOT, which was enough for a video camera to capture the light given off by the atoms as they fluoresce. Francium has not been synthesized in amounts large enough to weigh.

Implicate and explicate order

From Wikipedia, the free encyclopedia

Implicate order and explicate order are ontological concepts for quantum theory coined by theoretical physicist David Bohm during the early 1980s. They are used to describe two different frameworks for understanding the same phenomenon or aspect of reality. In particular, the concepts were developed in order to explain the bizarre behaviors of subatomic particles which quantum physics describes and predicts with elegant precision but struggles to explain. 

In Bohm's Wholeness and the Implicate Order, he used these notions to describe how the appearance of such phenomena might appear differently, or might be characterized by, varying principal factors, depending on contexts such as scales. The implicate (also referred to as the "enfolded") order is seen as a deeper and more fundamental order of reality. In contrast, the explicate or "unfolded" order includes the abstractions that humans normally perceive. As he wrote:

In the enfolded [or implicate] order, space and time are no longer the dominant factors determining the relationships of dependence or independence of different elements. Rather, an entirely different sort of basic connection of elements is possible, from which our ordinary notions of space and time, along with those of separately existent material particles, are abstracted as forms derived from the deeper order. These ordinary notions in fact appear in what is called the "explicate" or "unfolded" order, which is a special and distinguished form contained within the general totality of all the implicate orders (Bohm 1980, p. xv).

Overview

The notion of implicate and explicate orders emphasizes the primacy of structure and process over individual objects. The latter are seen as mere approximations of an underlying process. In this approach, quantum particles and other objects are understood to have only a limited degree of stability and autonomy.

Bohm believed that the weirdness of the behavior of quantum particles is caused by unobserved forces, maintaining that space and time might actually be derived from an even deeper level of objective reality. In the words of F. David Peat, Bohm considered that what we take for reality are "surface phenomena, explicate forms that have temporarily unfolded out of an underlying implicate order." That is, the implicate order is the ground from which reality emerges.

The implicate order as an algebra

Bohm, his co-worker Basil Hiley, and other physicists of Birkbeck College worked toward a model of quantum physics in which the implicate order is represented in the form of an appropriate algebra or other pregeometry. They considered spacetime itself as part of an explicate order that is connected to an implicate order that they called pre-space. The spacetime manifold and the properties of locality and nonlocality all arise from an order in such pre-space. A. M. Frescura and Hiley suggested that an implicate order could be carried by an algebra, with the explicate order being contained in the various representations of this algebra.

In analogy to Alfred North Whitehead's notion of "actual occasion," Bohm considered the notion of moment – a moment being a not entirely localizable event, with events being allowed to overlap and being connected in an overall implicate order:

I propose that each moment of time is a projection from the total implicate order. The term projection is a particularly happy choice here, not only because its common meaning is suitable for what is needed, but also because its mathematical meaning as a projection operation, P, is just what is required for working out these notions in terms of the quantum theory.

Bohm emphasized the primary role of the implicate order's structure:

My attitude is that the mathematics of the quantum theory deals primarily with the structure of the implicate pre-space and with how an explicate order of space and time emerges from it, rather than with movements of physical entities, such as particles and fields. (This is a kind of extension of what is done in general relativity, which deals primarily with geometry and only secondarily with the entities that are described within this geometry.)

The explicate order and quantum entanglement

Central to Bohm's schema are correlations between observables of entities which seem separated by great distances in the explicate order (such as a particular electron here on earth and an alpha particle in one of the stars in the Abell 1835 galaxy, then a possible candidate for farthest galaxy from Earth known to humans), manifestations of the implicate order. Within quantum theory, there is entanglement of such objects.

This view of order necessarily departs from any notion which entails signalling, and therefore causality. The correlation of observables does not imply a causal influence, and in Bohm's schema, the latter represents 'relatively' independent events in spacetime; and therefore explicate order.

A common grounding for consciousness and matter

Karl H. Pribram's research suggests that memories may not be localized in specific regions of brains

The implicate order represents the proposal of a general metaphysical concept in terms of which it is claimed that matter and consciousness might both be understood, in the sense that it is proposed that both matter and consciousness: (i) enfold the structure of the whole within each region, and (ii) involve continuous processes of enfoldment and unfoldment. For example, in the case of matter, entities such as atoms may represent continuous enfoldment and unfoldment which manifests as a relatively stable and autonomous entity that can be observed to follow a relatively well-defined path in spacetime. In the case of consciousness, Bohm pointed toward evidence presented by Karl Pribram that memories may be enfolded within every region of the brain rather than being localized (for example, in particular regions of the brain, cells, or atoms).

Bohm went on to say:

As in our discussion of matter in general, it is now necessary to go into the question of how in consciousness the explicate order is what is manifest ... the manifest content of consciousness is based essentially on memory, which is what allows such content to be held in a fairly constant form. Of course, to make possible such constancy it is also necessary that this content be organized, not only through relatively fixed association but also with the aid of the rules of logic, and of our basic categories of space, time, causality, universality, etc. ... there will be a strong background of recurrent, stable, and separable features, against which the transitory and changing aspects of the unbroken flow of experience will be seen as fleeting impressions that tend to be arranged and ordered mainly in terms of the vast totality of the relatively static and fragmented content of [memories].

Bohm also claimed that "as with consciousness, each moment has a certain explicate order, and in addition it enfolds all the others, though in its own way. So the relationship of each moment in the whole to all the others is implied by its total content: the way in which it 'holds' all the others enfolded within it." Bohm characterises consciousness as a process in which at each moment, content that was previously implicate is presently explicate, and content which was previously explicate has become implicate.

One may indeed say that our memory is a special case of the process described above, for all that is recorded is held enfolded within the brain cells and these are part of matter in general. The recurrence and stability of our own memory as a relatively independent sub-totality is thus brought about as part of the very same process that sustains the recurrence and stability in the manifest order of matter in general. It follows, then, that the explicate and manifest order of consciousness is not ultimately distinct from that of matter in general.

Analogies

Ink droplet analogy

Bohm also used the term unfoldment to characterise processes in which the explicate order becomes relevant (or "relevated"). Bohm likens unfoldment also to the decoding of a television signal to produce a sensible image on a screen. The signal, screen, and television electronics in this analogy represent the implicate order, while the image produced represents the explicate order. He also uses an example in which an ink droplet can be introduced into a highly viscous substance (such as glycerine), and the substance rotated very slowly, such that there is negligible diffusion of the substance. In this example, the droplet becomes a thread, which in turn eventually becomes invisible. However, by rotating the substance in the reverse direction, the droplet can essentially reform. When it is invisible, according to Bohm, the order of the ink droplet as a pattern can be said to be implicate within the substance.

In another analogy, Bohm asks us to consider a pattern produced by making small cuts in a folded piece of paper and then, literally, unfolding it. Widely separated elements of the pattern are, in actuality, produced by the same original cut in the folded piece of paper. Here, the cuts in the folded paper represent the implicate order, and the unfolded pattern represents the explicate order.

Holograms and implicate order

In a holographic reconstruction, each region of a photographic plate contains the whole image

Bohm employed the hologram as a means of characterising implicate order, noting that each region of a photographic plate in which a hologram is observable contains within it the whole three-dimensional image, which can be viewed from a range of perspectives. That is, each region contains a whole and undivided image. In Bohm's words:

There is the germ of a new notion of order here. This order is not to be understood solely in terms of a regular arrangement of objects (e.g., in rows) or as a regular arrangement of events (e.g., in a series). Rather, a total order is contained, in some implicit sense, in each region of space and time. Now, the word 'implicit' is based on the verb 'to implicate'. This means 'to fold inward' ... so we may be led to explore the notion that in some sense each region contains a total structure 'enfolded' within it".

Bohm noted that, although the hologram conveys undivided wholeness, it is nevertheless static.

In this view of order, laws represent invariant relationships between explicate entities and structures, and thus Bohm maintained that, in physics, the explicate order generally reveals itself within well-constructed experimental contexts as, for example, in the sensibly observable results of instruments. With respect to implicate order, however, Bohm asked us to consider the possibility instead "that physical law should refer primarily to an order of undivided wholeness of the content of description similar to that indicated by the hologram rather than to an order of analysis of such content into separate parts...".

Implicate order in art

In the work Science, Order, and Creativity (Bohm and Peat, 1987), examples of implicate orders in science are laid out, as well as implicate orders which relate to painting, poetry and music.

Bohm and Peat emphasize the role of orders of varying complexity, which influence the perception of a work of art as a whole. They note that implicate orders are accessible to human experience. They refer, for instance, to earlier notes which reverberate when listening to music, or various resonances of words and images which are perceived when reading or hearing poetry.

Christopher Alexander discussed his work in person with Bohm, and pointed out connections among his work and Bohm's notion of an implicate order in The Nature of Order.

Bohm features as a fictional character in the novel The Wave by British author Lochlan Bloom. The novel includes multiple narratives and explores many of the concepts of Bohm's work on implicate and explicate orders.

Challenges to some generally prevailing views

In proposing this new notion of order, Bohm explicitly challenged a number of tenets that he believed are fundamental to much scientific work:

  1. that phenomena are reducible to fundamental particles and laws describing the behaviour of particles, or more generally to any static (i.e., unchanging) entities, whether separate events in spacetime, quantum states, or static entities of some other nature;
  2. related to (1), that human knowledge is most fundamentally concerned with mathematical prediction of statistical aggregates of particles;
  3. that an analysis or description of any aspect of reality (e.g., quantum theory, the speed of light) can be unlimited in its domain of relevance;
  4. that the Cartesian coordinate system, or its extension to a curvilinear system, is the deepest conception of underlying order as a basis for analysis and description of the world;
  5. that there is ultimately a sustainable distinction between reality and thought, and that there is a corresponding distinction between the observer and observed in an experiment or any other situation (other than a distinction between relatively separate entities valid in the sense of explicate order); and
  6. that it is, in principle, possible to formulate a final notion concerning the nature of reality, i.e., a Theory of Everything.
A hydrogen atom and its constituent particles: an example of an over-simplified way of looking at a small collection of posited building blocks of the universe

Bohm's proposals have at times been dismissed largely on the basis of such tenets. His paradigm is generally opposed to reductionism, and some view it as a form of ontological holism. On this, Bohm noted of prevailing views among physicists that "the world is assumed to be constituted of a set of separately existent, indivisible, and unchangeable 'elementary particles', which are the fundamental 'building blocks' of the entire universe ... there seems to be an unshakable faith among physicists that either such particles, or some other kind yet to be discovered, will eventually make possible a complete and coherent explanation of everything" (Bohm 1980, p. 173).

In Bohm's conception of order, primacy is given to the undivided whole, and the implicate order inherent within the whole, rather than to parts of the whole, such as particles, quantum states, and continua. This whole encompasses all things, structures, abstractions, and processes, including processes that result in (relatively) stable structures as well as those that involve a metamorphosis of structures or things. In this view, parts may be entities normally regarded as physical, such as atoms or subatomic particles, but they may also be abstract entities, such as quantum states. Whatever their nature and character, according to Bohm, these parts are considered in terms of the whole, and in such terms, they constitute relatively separate and independent "sub-totalities." The implication of the view is, therefore, that nothing is fundamentally separate or independent.

Bohm 1980, p. 11, said: "The new form of insight can perhaps best be called Undivided Wholeness in Flowing Movement. This view implies that flow is in some sense prior to that of the ‘things’ that can be seen to form and dissolve in this flow." According to Bohm, a vivid image of this sense of analysis of the whole is afforded by vortex structures in a flowing stream. Such vortices can be relatively stable patterns within a continuous flow, but such an analysis does not imply that the flow patterns have any sharp division, or that they are literally separate and independently existent entities; rather, they are most fundamentally undivided. Thus, according to Bohm’s view, the whole is in continuous flux, and hence is referred to as the holomovement (movement of the whole).

Quantum theory and relativity theory

A key motivation for Bohm in proposing a new notion of order was the well-known incompatibility of quantum theory with relativity theory. Bohm 1980, p. xv summarised the state of affairs he perceived to exist:

...in relativity, movement is continuous, causally determinate and well defined, while in quantum mechanics it is discontinuous, not causally determinate and not well-defined. Each theory is committed to its own notions of essentially static and fragmentary modes of existence (relativity to that of separate events connectible by signals, and quantum mechanics to a well-defined quantum state). One thus sees that a new kind of theory is needed which drops these basic commitments and at most recovers some essential features of the older theories as abstract forms derived from a deeper reality in which what prevails is unbroken wholeness.

Bohm maintained that relativity and quantum theories are in basic contradiction in these essential respects, and that a new concept of order should begin with that toward which both theories point: undivided wholeness. This should not be taken to mean that he advocated such powerful theories be discarded. He argued that each was relevant in a certain context—i.e., a set of interrelated conditions within the explicate order—rather than having unlimited scope, and that apparent contradictions stem from attempts to overgeneralize by superposing the theories on one another, implying greater generality or broader relevance than is ultimately warranted. Thus, Bohm 1980, pp. 156–167 argued: "... in sufficiently broad contexts such analytic descriptions cease to be adequate ... 'the law of the whole' will generally include the possibility of describing the 'loosening' of aspects from each other, so that they will be relatively autonomous in limited contexts ... however, any form of relative autonomy (and heteronomy) is ultimately limited by holonomy, so that in a broad enough context such forms are seen to be merely aspects, relevated in the holomovement, rather than disjoint and separately existent things in interaction."

Hidden variable theory

Before developing his implicit order approach, Bohm had proposed a hidden variable theory of quantum physics (see Bohm interpretation). According to Bohm, a key motivation for doing so had been purely to show the possibility of such theories. On this, Bohm 1980, p. 81 said, "... it should be kept in mind that before this proposal was made there had existed the widespread impression that no conception of any hidden variable at all, not even if it were abstract and hypothetical, could possibly be consistent with the quantum theory." Bohm 1980, p. 110 also claimed that "the demonstration of the possibility of theories of hidden variables may serve in a more general philosophical sense to remind us of the unreliability of conclusions based on the assumption of the complete universality of certain features of a given theory, however general their domain of validity seems to be." Another aspect of Bohm's motivation had been to point out a confusion he perceived to exist in quantum theory. On the dominant approaches in quantum theory, he said: "...we wish merely to point out that this whole line of approach re-establishes at the abstract level of statistical potentialities the same kind of analysis into separate and autonomous components in interaction that is denied at the more concrete level of individual objects" (Bohm 1980, p. 174).

Deconstruction

From Wikipedia, the free encyclopedia

The term deconstruction refers to approaches to understanding the relationship between text and meaning. It was originated by the philosopher Jacques Derrida, who defined it as a turn away from Platonism's ideas of "true" forms and essences which take precedence over appearances, instead considering the constantly changing complex function of language, making static and idealist ideas of it inadequate. Deconstruction instead places emphasis on the mere appearance of language in both speech and writing, or suggests at least that essence as it is called is to be found in its appearance, while it itself is "undecidable", and everyday experiences cannot be empirically evaluated to find the actuality of language.

Deconstruction argues that language, especially in idealist concepts such as truth and justice, is irreducibly complex, unstable and difficult to determine, making fluid and comprehensive ideas of language more adequate in deconstructive criticism. Since the 1980s, these proposals of language's fluidity instead of being ideally static and discernible have inspired a range of studies in the humanities, including the disciplines of law, anthropology, historiography, linguistics, sociolinguistics, psychoanalysis, LGBT studies, and feminism. Deconstruction also inspired deconstructivism in architecture and remains important within art, music, and literary criticism.

Overview

Jacques Derrida's 1967 book Of Grammatology introduced the majority of ideas influential within deconstruction. Derrida published a number of other works directly relevant to the concept of deconstruction, such as Différance, Speech and Phenomena, and Writing and Difference.

According to Derrida, and taking inspiration from the work of Ferdinand de Saussure, language as a system of signs and words only has meaning because of the contrast between these signs. As Richard Rorty contends, "words have meaning only because of contrast-effects with other words...no word can acquire meaning in the way in which philosophers from Aristotle to Bertrand Russell have hoped it might—by being the unmediated expression of something non-linguistic (e.g., an emotion, a sensed observation, a physical object, an idea, a Platonic Form)". As a consequence, meaning is never present, but rather is deferred to other signs. Derrida refers to this—in his view, mistaken—belief there is a self-sufficient, non-deferred meaning as metaphysics of presence. A concept, then, must be understood in the context of its opposite: for example, the word "being" does not have meaning without contrast with the word "nothing".

Further, Derrida contends that "in a classical philosophical opposition we are not dealing with the peaceful coexistence of a vis-a-vis, but rather with a violent hierarchy. One of the two terms governs the other (axiologically, logically, etc.), or has the upper hand": signified over signifier; intelligible over sensible; speech over writing; activity over passivity, etc. The first task of deconstruction is, according to Derrida, to find and overturn these oppositions inside text(s); but the final objective of deconstruction is not to surpass all oppositions, because it is assumed they are structurally necessary to produce sense- the oppositions simply cannot be suspended once and for all, as the hierarchy of dual oppositions always reestablishes itself (because it is necessary to meaning). Deconstruction, Derrida says, only points to the necessity of an unending analysis that can make explicit the decisions and hierarchies intrinsic to all texts.

Derrida further argues that it is not enough to expose and deconstruct the way oppositions work and then stop there in a nihilistic or cynical position, "thereby preventing any means of intervening in the field effectively". To be effective, deconstruction needs to create new terms, not to synthesize the concepts in opposition, but to mark their difference and eternal interplay. This explains why Derrida always proposes new terms in his deconstruction, not as a free play but from the necessity of analysis. Derrida called these undecidables—that is, unities of simulacrum—"false" verbal properties (nominal or semantic) that can no longer be included within philosophical (binary) opposition. Instead, they inhabit philosophical oppositions—resisting and organizing them—without ever constituting a third term or leaving room for a solution in the form of a Hegelian dialectic (e.g., différance, archi-writing, pharmakon, supplement, hymen, gram, spacing).

Influences

Derrida's theories on deconstruction were themselves influenced by the work of linguists such as Ferdinand de Saussure (whose writings on semiotics also became a cornerstone of structuralism in the mid-20th century) and literary theorists such as Roland Barthes (whose works were an investigation of the logical ends of structuralist thought). Derrida's views on deconstruction stood in opposition to the theories of structuralists such as psychoanalytic theorist Jacques Lacan, and anthropologist Claude Lévi-Strauss. However, Derrida resisted attempts to label his work as "post-structuralist".

Influence of Nietzsche

Friedrich Nietzsche

Derrida's motivation for developing deconstructive criticism, suggesting the fluidity of language over static forms, was largely inspired by Friedrich Nietzsche's philosophy, beginning with his interpretation of Orpheus. In Daybreak, Nietzsche announces that "All things that live long are gradually so saturated with reason that their origin in unreason thereby becomes improbable. Does not almost every precise history of an origination impress our feelings as paradoxical and wantonly offensive? Does the good historian not, at bottom, constantly contradict?".

Nietzsche's point in Daybreak is that standing at the end of modern history, modern thinkers know too much to continue to be deceived by an illusory grasp of satisfactorily complete reason. Mere proposals of heightened reasoning, logic, philosophizing and science are no longer solely sufficient as the royal roads to truth. Nietzsche disregards Platonism to revisualize the history of the West as the self-perpetuating history of a series of political moves, that is, a manifestation of the will to power, that at bottom have no greater or lesser claim to truth in any noumenal (absolute) sense. By calling our attention to the fact that he has assumed the role of Orpheus, the man underground, in dialectical opposition to Plato, Nietzsche hopes to sensitize us to the political and cultural context, and the political influences that impact authorship.

Where Nietzsche did not achieve deconstruction, as Derrida sees it, is that he missed the opportunity to further explore the will to power as more than a manifestation of the sociopolitically effective operation of writing that Plato characterized, stepping beyond Nietzsche's penultimate revaluation of all Western values, to the ultimate, which is the emphasis on "the role of writing in the production of knowledge".

Influence of Saussure

Derrida approaches all texts as constructed around elemental oppositions which all discourse has to articulate if it intends to make any sense whatsoever. This is so because identity is viewed in non-essentialist terms as a construct, and because constructs only produce meaning through the interplay of difference inside a "system of distinct signs". This approach to text is influenced by the semiology of Ferdinand de Saussure.

Saussure is considered one of the fathers of structuralism when he explained that terms get their meaning in reciprocal determination with other terms inside language:

In language there are only differences. Even more important: a difference generally implies positive terms between which the difference is set up; but in language there are only differences without positive terms. Whether we take the signified or the signifier, language has neither ideas nor sounds that existed before the linguistic system, but only conceptual and phonic differences that have issued from the system. The idea or phonic substance that a sign contains is of less importance than the other signs that surround it. [...] A linguistic system is a series of differences of sound combined with a series of differences of ideas; but the pairing of a certain number of acoustical signs with as many cuts made from the mass thought engenders a system of values.

Saussure explicitly suggested that linguistics was only a branch of a more general semiology, a science of signs in general, human codes being only one part. Nevertheless, in the end, as Derrida pointed out, Saussure made linguistics "the regulatory model", and "for essential, and essentially metaphysical, reasons had to privilege speech, and everything that links the sign to phone". Derrida will prefer to follow the more "fruitful paths (formalization)" of a general semiotics without falling into what he considered "a hierarchizing teleology" privileging linguistics, and to speak of "mark" rather than of language, not as something restricted to mankind, but as prelinguistic, as the pure possibility of language, working everywhere there is a relation to something else.

Deconstruction according to Derrida

Etymology

Derrida's original use of the word "deconstruction" was a translation of Destruktion, a concept from the work of Martin Heidegger that Derrida sought to apply to textual reading. Heidegger's term referred to a process of exploring the categories and concepts that tradition has imposed on a word, and the history behind them.

Basic philosophical concerns

Derrida's concerns flow from a consideration of several issues:

  1. A desire to contribute to the re-evaluation of all Western values, a re-evaluation built on the 18th-century Kantian critique of pure reason, and carried forward to the 19th century, in its more radical implications, by Kierkegaard and Nietzsche.
  2. An assertion that texts outlive their authors, and become part of a set of cultural habits equal to, if not surpassing, the importance of authorial intent.
  3. A re-valuation of certain classic western dialectics: poetry vs. philosophy, reason vs. revelation, structure vs. creativity, episteme vs. techne, etc.

To this end, Derrida follows a long line of modern philosophers, who look backwards to Plato and his influence on the Western metaphysical tradition. Like Nietzsche, Derrida suspects Plato of dissimulation in the service of a political project, namely the education, through critical reflections, of a class of citizens more strategically positioned to influence the polis. However, like Nietzsche, Derrida is not satisfied merely with such a political interpretation of Plato, because of the particular dilemma modern humans find themselves in. His Platonic reflections are inseparably part of his critique of modernity, hence the attempt to be something beyond the modern, because of this Nietzschean sense that the modern has lost its way and become mired in nihilism.

Différance

Différance is the observation that the meanings of words come from their synchrony with other words within the language and their diachrony between contemporary and historical definitions of a word. Understanding language, according to Derrida, requires an understanding of both viewpoints of linguistic analysis. The focus on diachrony has led to accusations against Derrida of engaging in the etymological fallacy.

There is one statement by Derrida—in an essay on Rousseau in Of Grammatology—which has been of great interest to his opponents. It is the assertion that "there is no outside-text" (il n'y a pas de hors-texte), which is often mistranslated as "there is nothing outside of the text". The mistranslation is often used to suggest Derrida believes that nothing exists but words. Michel Foucault, for instance, famously misattributed to Derrida the very different phrase "Il n'y a rien en dehors du texte" for this purpose.[25] According to Derrida, his statement simply refers to the unavoidability of context that is at the heart of différance.

For example, the word "house" derives its meaning more as a function of how it differs from "shed", "mansion", "hotel", "building", etc. (Form of Content, that Louis Hjelmslev distinguished from Form of Expression) than how the word "house" may be tied to a certain image of a traditional house (i.e., the relationship between signified and signifier), with each term being established in reciprocal determination with the other terms than by an ostensive description or definition: when can we talk about a "house" or a "mansion" or a "shed"? The same can be said about verbs, in all the languages in the world: when should we stop saying "walk" and start saying "run"? The same happens, of course, with adjectives: when must we stop saying "yellow" and start saying "orange", or exchange "past" for "present"? Not only are the topological differences between the words relevant here, but the differentials between what is signified is also covered by différance.

Thus, complete meaning is always "differential" and postponed in language; there is never a moment when meaning is complete and total. A simple example would consist of looking up a given word in a dictionary, then proceeding to look up the words found in that word's definition, etc., also comparing with older dictionaries. Such a process would never end.

Metaphysics of presence

Derrida describes the task of deconstruction as the identification of metaphysics of presence, or logocentrism in western philosophy. Metaphysics of presence is the desire for immediate access to meaning, the privileging of presence over absence. This means that there is an assumed bias in certain binary oppositions where one side is placed in a position over another, such as good over bad, speech over the written word, male over female. Derrida writes,

Without a doubt, Aristotle thinks of time on the basis of ousia as parousia, on the basis of the now, the point, etc. And yet an entire reading could be organized that would repeat in Aristotle's text both this limitation and its opposite.

To Derrida, the central bias of logocentrism was the now being placed as more important than the future or past. This argument is largely based on the earlier work of Heidegger, who, in Being and Time, claimed that the theoretical attitude of pure presence is parasitical upon a more originary involvement with the world in concepts such as ready-to-hand and being-with.

Deconstruction and dialectics

In the deconstruction procedure, one of the main concerns of Derrida is to not collapse into Hegel's dialectic, where these oppositions would be reduced to contradictions in a dialectic that has the purpose of resolving it into a synthesis. The presence of Hegelian dialectics was enormous in the intellectual life of France during the second half of the 20th century, with the influence of Kojève and Hyppolite, but also with the impact of dialectics based on contradiction developed by Marxists, and including the existentialism of Sartre, etc. This explains Derrida's concern to always distinguish his procedure from Hegel's, since Hegelianism believes binary oppositions would produce a synthesis, while Derrida saw binary oppositions as incapable of collapsing into a synthesis free from the original contradiction.

Difficulty of definition

There have been problems defining deconstruction. Derrida claimed that all of his essays were attempts to define what deconstruction is, and that deconstruction is necessarily complicated and difficult to explain since it actively criticises the very language needed to explain it.

Derrida's "negative" descriptions

Derrida has been more forthcoming with negative (apophatic) than with positive descriptions of deconstruction. When asked by Toshihiko Izutsu some preliminary considerations on how to translate "deconstruction" in Japanese, in order to at least prevent using a Japanese term contrary to deconstruction's actual meaning, Derrida began his response by saying that such a question amounts to "what deconstruction is not, or rather ought not to be".

Derrida states that deconstruction is not an analysis, a critique, or a method in the traditional sense that philosophy understands these terms. In these negative descriptions of deconstruction, Derrida is seeking to "multiply the cautionary indicators and put aside all the traditional philosophical concepts". This does not mean that deconstruction has absolutely nothing in common with an analysis, a critique, or a method, because while Derrida distances deconstruction from these terms, he reaffirms "the necessity of returning to them, at least under erasure". Derrida's necessity of returning to a term under erasure means that even though these terms are problematic we must use them until they can be effectively reformulated or replaced. The relevance of the tradition of negative theology to Derrida's preference for negative descriptions of deconstruction is the notion that a positive description of deconstruction would over-determine the idea of deconstruction and would close off the openness that Derrida wishes to preserve for deconstruction. If Derrida were to positively define deconstruction—as, for example, a critique—then this would make the concept of critique immune to itself being deconstructed. Some new philosophy beyond deconstruction would then be required in order to encompass the notion of critique.

Not a method

Derrida states that "Deconstruction is not a method, and cannot be transformed into one". This is because deconstruction is not a mechanical operation. Derrida warns against considering deconstruction as a mechanical operation, when he states that "It is true that in certain circles (university or cultural, especially in the United States) the technical and methodological "metaphor" that seems necessarily attached to the very word 'deconstruction' has been able to seduce or lead astray".[ Commentator Richard Beardsworth explains that:

Derrida is careful to avoid this term [method] because it carries connotations of a procedural form of judgement. A thinker with a method has already decided how to proceed, is unable to give him or herself up to the matter of thought in hand, is a functionary of the criteria which structure his or her conceptual gestures. For Derrida [...] this is irresponsibility itself. Thus, to talk of a method in relation to deconstruction, especially regarding its ethico-political implications, would appear to go directly against the current of Derrida's philosophical adventure.

Beardsworth here explains that it would be irresponsible to undertake a deconstruction with a complete set of rules that need only be applied as a method to the object of deconstruction, because this understanding would reduce deconstruction to a thesis of the reader that the text is then made to fit. This would be an irresponsible act of reading, because it becomes a prejudicial procedure that only finds what it sets out to find.

Not a critique

Derrida states that deconstruction is not a critique in the Kantian sense. This is because Kant defines the term critique as the opposite of dogmatism. For Derrida, it is not possible to escape the dogmatic baggage of the language we use in order to perform a pure critique in the Kantian sense. Language is dogmatic because it is inescapably metaphysical. Derrida argues that language is inescapably metaphysical because it is made up of signifiers that only refer to that which transcends them—the signified. In addition, Derrida asks rhetorically "Is not the idea of knowledge and of the acquisition of knowledge in itself metaphysical?" By this, Derrida means that all claims to know something necessarily involve an assertion of the metaphysical type that something is the case somewhere. For Derrida the concept of neutrality is suspect and dogmatism is therefore involved in everything to a certain degree. Deconstruction can challenge a particular dogmatism and hence de-sediment dogmatism in general, but it cannot escape all dogmatism all at once.

Not an analysis

Derrida states that deconstruction is not an analysis in the traditional sense. This is because the possibility of analysis is predicated on the possibility of breaking up the text being analysed into elemental component parts. Derrida argues that there are no self-sufficient units of meaning in a text, because individual words or sentences in a text can only be properly understood in terms of how they fit into the larger structure of the text and language itself. For more on Derrida's theory of meaning see the article on différance.

Not post-structuralist

Derrida states that his use of the word deconstruction first took place in a context in which "structuralism was dominant" and deconstruction's meaning is within this context. Derrida states that deconstruction is an "antistructuralist gesture" because "[s]tructures were to be undone, decomposed, desedimented". At the same time, deconstruction is also a "structuralist gesture" because it is concerned with the structure of texts. So, deconstruction involves "a certain attention to structures" and tries to "understand how an 'ensemble' was constituted". As both a structuralist and an antistructuralist gesture, deconstruction is tied up with what Derrida calls the "structural problematic". The structural problematic for Derrida is the tension between genesis, that which is "in the essential mode of creation or movement", and structure: "systems, or complexes, or static configurations". An example of genesis would be the sensory ideas from which knowledge is then derived in the empirical epistemology. An example of structure would be a binary opposition such as good and evil where the meaning of each element is established, at least partly, through its relationship to the other element.

It is for this reason that Derrida distances his use of the term deconstruction from post-structuralism, a term that would suggest that philosophy could simply go beyond structuralism. Derrida states that "the motif of deconstruction has been associated with 'post-structuralism'", but that this term was "a word unknown in France until its 'return' from the United States". In his deconstruction of Edmund Husserl, Derrida actually argues for the contamination of pure origins by the structures of language and temporality. Manfred Frank has even referred to Derrida's work as "neostructuralism", identifying a "distaste for the metaphysical concepts of domination and system".

Alternative definitions

The popularity of the term deconstruction, combined with the technical difficulty of Derrida's primary material on deconstruction and his reluctance to elaborate his understanding of the term, has meant that many secondary sources have attempted to give a more straightforward explanation than Derrida himself ever attempted. Secondary definitions are therefore an interpretation of deconstruction by the person offering them rather than a summary of Derrida's actual position.

  • Paul de Man was a member of the Yale School and a prominent practitioner of deconstruction as he understood it. His definition of deconstruction is that, "[i]t's possible, within text, to frame a question or undo assertions made in the text, by means of elements which are in the text, which frequently would be precisely structures that play off the rhetorical against grammatical elements."
  • Richard Rorty was a prominent interpreter of Derrida's philosophy. His definition of deconstruction is that, "the term 'deconstruction' refers in the first instance to the way in which the 'accidental' features of a text can be seen as betraying, subverting, its purportedly 'essential' message."
  • According to John D. Caputo, the very meaning and mission of deconstruction is:

    "to show that things-texts, institutions, traditions, societies, beliefs, and practices of whatever size and sort you need - do not have definable meanings and determinable missions, that they are always more than any mission would impose, that they exceed the boundaries they currently occupy"

  • Niall Lucy points to the impossibility of defining the term at all, stating:

    "While in a sense it is impossibly difficult to define, the impossibility has less to do with the adoption of a position or the assertion of a choice on deconstruction's part than with the impossibility of every 'is' as such. Deconstruction begins, as it were, from a refusal of the authority or determining power of every 'is', or simply from a refusal of authority in general. While such refusal may indeed count as a position, it is not the case that deconstruction holds this as a sort of 'preference' ".

  • David B. Allison, an early translator of Derrida, states in the introduction to his translation of Speech and Phenomena:

    [Deconstruction] signifies a project of critical thought whose task is to locate and 'take apart' those concepts which serve as the axioms or rules for a period of thought, those concepts which command the unfolding of an entire epoch of metaphysics. 'Deconstruction' is somewhat less negative than the Heideggerian or Nietzschean terms 'destruction' or 'reversal'; it suggests that certain foundational concepts of metaphysics will never be entirely eliminated...There is no simple 'overcoming' of metaphysics or the language of metaphysics.

  • Paul Ricœur defines deconstruction as a way of uncovering the questions behind the answers of a text or tradition.

A survey of the secondary literature reveals a wide range of heterogeneous arguments. Particularly problematic are the attempts to give neat introductions to deconstruction by people trained in literary criticism who sometimes have little or no expertise in the relevant areas of philosophy in which Derrida is working. These secondary works (e.g. Deconstruction for Beginners and Deconstructions: A User's Guide)[37][page needed] have attempted to explain deconstruction while being academically criticized for being too far removed from the original texts and Derrida's actual position.

Application

Derrida's observations have greatly influenced literary criticism and post-structuralism.

Literary criticism

Derrida's method consisted of demonstrating all the forms and varieties of the originary complexity of semiotics, and their multiple consequences in many fields. His way of achieving this was by conducting thorough, careful, sensitive, and yet transformational readings of philosophical and literary texts, with an ear to what in those texts runs counter to their apparent systematicity (structural unity) or intended sense (authorial genesis). By demonstrating the aporias and ellipses of thought, Derrida hoped to show the infinitely subtle ways that this originary complexity, which by definition cannot ever be completely known, works its structuring and destructuring effects.

Deconstruction denotes the pursuing of the meaning of a text to the point of exposing the supposed contradictions and internal oppositions upon which it is founded—supposedly showing that those foundations are irreducibly complex, unstable, or impossible. It is an approach that may be deployed in philosophy, in literary analysis, and even in the analysis of scientific writings. Deconstruction generally tries to demonstrate that any text is not a discrete whole but contains several irreconcilable and contradictory meanings; that any text therefore has more than one interpretation; that the text itself links these interpretations inextricably; that the incompatibility of these interpretations is irreducible; and thus that an interpretative reading cannot go beyond a certain point. Derrida refers to this point as an "aporia" in the text; thus, deconstructive reading is termed "aporetic". He insists that meaning is made possible by the relations of a word to other words within the network of structures that language is.

Derrida initially resisted granting to his approach the overarching name "deconstruction", on the grounds that it was a precise technical term that could not be used to characterize his work generally. Nevertheless, he eventually accepted that the term had come into common use to refer to his textual approach, and Derrida himself increasingly began to use the term in this more general way.

Derrida's deconstruction strategy is also used by postmodernists to locate meaning in a text rather than discover meaning due to the position that it has multiple readings. There is a focus on the deconstruction that denotes the tearing apart of a text to find arbitrary hierarchies and presuppositions for the purpose of tracing contradictions that shadow a text's coherence. Here, the meaning of a text does not reside with the author or the author's intentions because it is dependent on the interaction between reader and text. Even the process of translation is also seen as transformative since it "modifies the original even as it modifies the translating language".

Critique of structuralism

Derrida's lecture at Johns Hopkins University, "Structure, Sign, and Play in the Human Sciences", often appears in collections as a manifesto against structuralism. Derrida's essay was one of the earliest to propose some theoretical limitations to structuralism, and to attempt to theorize on terms that were clearly no longer structuralist. Structuralism viewed language as a number of signs, composed of a signified (the meaning) and a signifier (the word itself). Derrida proposed that signs always referred to other signs, existing only in relation to each other, and there was therefore no ultimate foundation or centre. This is the basis of différance.

Development after Derrida

The Yale School

Between the late 1960s and the early 1980s, many thinkers were influenced by deconstruction, including Paul de Man, Geoffrey Hartman, and J. Hillis Miller. This group came to be known as the Yale school and was especially influential in literary criticism. Derrida and Hillis Miller were subsequently affiliated with the University of California, Irvine.

Miller has described deconstruction this way: "Deconstruction is not a dismantling of the structure of a text, but a demonstration that it has already dismantled itself. Its apparently solid ground is no rock, but thin air."

Critical legal studies movement

Arguing that law and politics cannot be separated, the founders of the "Critical Legal Studies Movement" found it necessary to criticize the absence of the recognition of this inseparability at the level of theory. To demonstrate the indeterminacy of legal doctrine, these scholars often adopt a method, such as structuralism in linguistics, or deconstruction in Continental philosophy, to make explicit the deep structure of categories and tensions at work in legal texts and talk. The aim was to deconstruct the tensions and procedures by which they are constructed, expressed, and deployed.

For example, Duncan Kennedy, in explicit reference to semiotics and deconstruction procedures, maintains that various legal doctrines are constructed around the binary pairs of opposed concepts, each of which has a claim upon intuitive and formal forms of reasoning that must be made explicit in their meaning and relative value, and criticized. Self and other, private and public, subjective and objective, freedom and control are examples of such pairs demonstrating the influence of opposing concepts on the development of legal doctrines throughout history.

Deconstructing History

Deconstructive readings of history and sources have changed the entire discipline of history. In Deconstructing History, Alun Munslow examines history in what he argues is a postmodern age. He provides an introduction to the debates and issues of postmodernist history. He also surveys the latest research into the relationship between the past, history, and historical practice, as well as articulating his own theoretical challenges.

The Inoperative Community

Jean-Luc Nancy argues, in his 1982 book The Inoperative Community, for an understanding of community and society that is undeconstructable because it is prior to conceptualisation. Nancy's work is an important development of deconstruction because it takes the challenge of deconstruction seriously and attempts to develop an understanding of political terms that is undeconstructable and therefore suitable for a philosophy after Derrida.

The Ethics of Deconstruction

Simon Critchley argues, in his 1992 book The Ethics of Deconstruction, that Derrida's deconstruction is an intrinsically ethical practice. Critchley argues that deconstruction involves an openness to the Other that makes it ethical in the Levinasian understanding of the term.

Derrida and the Political

Judith Butler

Jacques Derrida has had a great influence on contemporary political theory and political philosophy. Derrida's thinking has inspired Slavoj Zizek, Richard Rorty, Ernesto Laclau, Judith Butler and many more contemporary theorists who have developed a deconstructive approach to politics. Because deconstruction examines the internal logic of any given text or discourse it has helped many authors to analyse the contradictions inherent in all schools of thought; and, as such, it has proved revolutionary in political analysis, particularly ideology critiques.

Richard Beardsworth, developing from Critchley's Ethics of Deconstruction, argues, in his 1996 Derrida and the Political, that deconstruction is an intrinsically political practice. He further argues that the future of deconstruction faces a perhaps undecidable choice between a theological approach and a technological approach, represented first of all by the work of Bernard Stiegler.

Criticisms

Derrida was involved in a number of high-profile disagreements with prominent philosophers, including Michel Foucault, John Searle, Willard Van Orman Quine, Peter Kreeft, and Jürgen Habermas. Most of the criticism of deconstruction were first articulated by these philosophers then repeated elsewhere.

John Searle

In the early 1970s, Searle had a brief exchange with Jacques Derrida regarding speech-act theory. The exchange was characterized by a degree of mutual hostility between the philosophers, each of whom accused the other of having misunderstood his basic points. Searle was particularly hostile to Derrida's deconstructionist framework and much later refused to let his response to Derrida be printed along with Derrida's papers in the 1988 collection Limited Inc. Searle did not consider Derrida's approach to be legitimate philosophy, or even intelligible writing, and argued that he did not want to legitimize the deconstructionist point of view by paying any attention to it. Consequently, some critics have considered the exchange to be a series of elaborate misunderstandings rather than a debate, while others have seen either Derrida or Searle gaining the upper hand. The level of hostility can be seen from Searle's statement that "It would be a mistake to regard Derrida's discussion of Austin as a confrontation between two prominent philosophical traditions", to which Derrida replied that that sentence was "the only sentence of the 'reply' to which I can subscribe". Commentators have frequently interpreted the exchange as a prominent example of a confrontation between analytic and continental philosophies.

The debate began in 1972, when, in his paper "Signature Event Context", Derrida analyzed J. L. Austin's theory of the illocutionary act. While sympathetic to Austin's departure from a purely denotational account of language to one that includes "force", Derrida was sceptical of the framework of normativity employed by Austin. Derrida argued that Austin had missed the fact that any speech event is framed by a "structure of absence" (the words that are left unsaid due to contextual constraints) and by "iterability" (the constraints on what can be said, imposed by what has been said in the past). Derrida argued that the focus on intentionality in speech-act theory was misguided because intentionality is restricted to that which is already established as a possible intention. He also took issue with the way Austin had excluded the study of fiction, non-serious, or "parasitic" speech, wondering whether this exclusion was because Austin had considered these speech genres as governed by different structures of meaning, or hadn't considered them due to a lack of interest. In his brief reply to Derrida, "Reiterating the Differences: A Reply to Derrida", Searle argued that Derrida's critique was unwarranted because it assumed that Austin's theory attempted to give a full account of language and meaning when its aim was much narrower. Searle considered the omission of parasitic discourse forms to be justified by the narrow scope of Austin's inquiry. Searle agreed with Derrida's proposal that intentionality presupposes iterability, but did not apply the same concept of intentionality used by Derrida, being unable or unwilling to engage with the continental conceptual apparatus. This, in turn, caused Derrida to criticize Searle for not being sufficiently familiar with phenomenological perspectives on intentionality. Some critics have suggested that Searle, by being so grounded in the analytical tradition that he was unable to engage with Derrida's continental phenomenological tradition, was at fault for the unsuccessful nature of the exchange, however Searle also argued that Derrida's disagreement with Austin turned on Derrida's having misunderstood Austin's type–token distinction and having failed to understand Austin's concept of failure in relation to performativity.

Derrida, in his response to Searle ("a b c ..." in Limited Inc), ridiculed Searle's positions. Claiming that a clear sender of Searle's message could not be established, Derrida suggested that Searle had formed with Austin a société à responsabilité limitée (a "limited liability company") due to the ways in which the ambiguities of authorship within Searle's reply circumvented the very speech act of his reply. Searle did not reply. Later in 1988, Derrida tried to review his position and his critiques of Austin and Searle, reiterating that he found the constant appeal to "normality" in the analytical tradition to be problematic.

In 1995, Searle gave a brief reply to Derrida in The Construction of Social Reality. He called Derrida's conclusion "preposterous" and stated that "Derrida, as far as I can tell, does not have an argument. He simply declares that there is nothing outside of texts..." Searle's reference here is not to anything forwarded in the debate, but to a mistranslation of the phrase "il n'y a pas dehors du texte," ("There is no outside-text") which appears in Derrida's Of Grammatology.

Jürgen Habermas

In The Philosophical Discourse of Modernity, Jürgen Habermas criticized what he considered Derrida's opposition to rational discourse. Further, in an essay on religion and religious language, Habermas criticized Derrida's emphasis on etymology and philology.

Walter A. Davis

The American philosopher Walter A. Davis, in Inwardness and Existence: Subjectivity in/and Hegel, Heidegger, Marx and Freud, argues that both deconstruction and structuralism are prematurely arrested moments of a dialectical movement that issues from Hegelian "unhappy consciousness".

In popular media

Popular criticism of deconstruction intensified following the Sokal affair, which many people took as an indicator of the quality of deconstruction as a whole, despite the absence of Derrida from Sokal's follow-up book Impostures Intellectuelles.

Chip Morningstar holds a view critical of deconstruction, believing it to be "epistemologically challenged". He claims the humanities are subject to isolation and genetic drift due to their unaccountability to the world outside academia. During the Second International Conference on Cyberspace (Santa Cruz, California, 1991), he reportedly heckled deconstructionists off the stage. He subsequently presented his views in the article "How to Deconstruct Almost Anything", where he stated, "Contrary to the report given in the 'Hype List' column of issue #1 of Wired ('Po-Mo Gets Tek-No', page 87), we did not shout down the postmodernists. We made fun of them."

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