- Willard Van Orman Quine
- Unreferenced|date=August 2007Infobox Philosopher

region =Western Philosophy

era =20th-century philosophy

color = #B0C4DE

image_caption = Willard Van Orman Quine

name = Willard Van Orman Quine

birth = birth date|mf=yes|1908|6|25

death = death date and age|mf=yes|2000|12|25|1908|6|25

school_tradition = Analytic

main_interests =Logic ·Ontology ·Epistemology Philosophy of language Philosophy of mathematics Philosophy of science Set theory

notable_ideas =Indeterminacy of translation Inscrutability of reference Ontological relativity Radical translation Confirmation holism Philosophical naturalism

influences =Rudolf Carnap ·Alfred Tarski Vienna Circle ·Bertrand Russell C.I. Lewis· A.N. WhiteheadWilliam of Ockham

influenced = Donald Davidson·Daniel Dennett David Lewis·Scott Soames David Kaplan·Richard Rorty Gila Sher ·Patricia Churchland Noam Chomsky **Willard Van Orman Quine**(June 25, 1908Akron ,Ohio – December 25, 2000) (known to intimates as "Van"), was an American analytic philosopher andlogician . From 1930 until his death 70 years later, Quine was affiliated in some way withHarvard University , first as a student, then as a professor of philosophy and a teacher of mathematics, and finally as an emeritus elder statesman who published or revised seven books in retirement. He filled theEdgar Pierce Chair of Philosophy at Harvard, 1956-78. Quine falls squarely into theanalytic philosophy tradition while also being the main proponent of the view that philosophy is notconceptual analysis . His major writings include "Two Dogmas of Empiricism ", which attacked the distinction between analytic and syntheticproposition s and advocated a form ofsemantic holism , and "Word and Object " which further developed these positions and introduced the notoriousindeterminacy of translation thesis.**Biography**"The Time of My Life" (1986) is his autobiography. Quine grew up in Akron,

Ohio . His father was a manufacturing entrepreneur and his mother was a schoolteacher. He received his B.A. in mathematics and philosophy fromOberlin College in 1930 and his Ph.D. in philosophy fromHarvard University in 1932. His thesis supervisor wasAlfred North Whitehead . He was then appointed aHarvard Junior Fellow , which excused him from having to teach for four years. During the academic year 1932-33, he travelled in Europe thanks to a fellowship, meeting Polish logicians (includingAlfred Tarski ) and members of theVienna Circle (includingRudolf Carnap ).It was through Quine's good offices that

Alfred Tarski was invited to attend the September 1939Unity of Science Congress in Cambridge. To attend that Congress, Tarski sailed for the USA on the last ship to leaveGdańsk before theThird Reich invaded Poland. Tarski survived the war and worked another 44 years in the USA.During WWII, Quine lectured on logic in Brazil, in Portuguese, and served in the United States Navy in a

military intelligence role, reaching the rank of Lieutenant Commander.At Harvard, Quine helped supervise the Harvard theses of, among others, Donald Davidson, David Lewis,

Daniel Dennett ,Gilbert Harman ,Dagfinn Føllesdal , Hao Wang,Hugues LeBlanc andHenry Hiz .Quine had four children by two marriages.

**Work**Quine's Ph.D. thesis and early publications were on

formal logic andset theory . Only after WWII did he, by virtue of seminal papers onontology ,epistemology and language, emerge as a major philosopher. By the 1960s, he had worked out his "naturalized epistemology" whose aim was to answer all substantive questions of knowledge and meaning using the methods and tools of the natural sciences. Quine roundly rejected the notion that there should be a "first philosophy", a theoretical standpoint somehow prior to natural science and capable of justifying it. These views are intrinsic to his naturalism.Quine often wrote superbly crafted and witty English prose. He had a gift for languages and could lecture in French, Spanish, Portuguese and German. But like the logical positivists, he evinced little interest in the philosophical canon: only once did he teach a course in the history of philosophy, on Hume.

academia

teachers=Rudolf Carnap Clarence Irving Lewis Alfred North Whitehead

students=Donald DavidsonDaniel Dennett Dagfinn Føllesdal Gilbert Harman David Lewis Hao Wang Theodore KaczynskiTom Lehrer **Rejection of the analytic-synthetic distinction**In the 1930s and 40s, discussions with Carnap,

Nelson Goodman andAlfred Tarski , among others, led Quine to doubt the tenability of the distinction between "analytic" statements — those true simply by the meanings of their words, such as "All bachelors are unmarried" — and "synthetic" statements, those true or false by virtue of facts about the world, such as "There is a cat on the mat." This distinction was central tological positivism . Although Quine's criticisms played a major role in the decline of logical positivism, he remained averificationist , to the point of invoking verificationism to undermine the analytic-synthetic distinction. As a verificationist, he drew on several sources including his Harvard colleagueB.F. Skinner , and particularly on his analysis of language in "Verbal Behavior". Quine was a major editor of the journal "Behaviorism".Like other

analytic philosophers before him, Quine accepted thedefinition of "analytic" as "true in virtue of meaning alone". Unlike them, however, he concluded that ultimately the definition was circular. In other words, Quine accepted that analytic statements are those that are true by definition, then argued that the notion of truth by definition was unsatisfactory.Quine's chief objection to analyticity is with the notion of

synonymy (sameness of meaning), a sentence being analytic just in case it is synonymous with "All black things are black" (or any otherlogical truth ). The objection to synonymy hinges upon the problem of collateral information. We intuitively feel that there is a distinction between "All unmarried men are bachelors" and "There have been black dogs", but a competent English speaker will assent to both sentences under all conditions since such speakers also have access to "collateral information" bearing on the historical existence of black dogs. Quine maintains that there is no distinction between universally known collateral information and conceptual or analytic truths.Another approach to Quine's objection to analyticity and synonymy emerges from the modal notion of

logical possibility . A traditionalWittgenstein ian view of meaning held that each meaningful sentence was associated with a region in the space of possible worlds. Quine finds the notion of such a space problematic, arguing that there is no distinction between those truths which are universally and confidently believed and those which are necessarily true.**Confirmation holism and ontological relativity**The central theses underlying the

indeterminacy of translation and other extensions of Quine's work areontological relativity and the relateddoctrine ofconfirmation holism . The premise of confirmationholism is that all theories (and the propositions derived from them) are under-determined by empirical data (data, sensory-data, evidence); although some theories are not justifiable, failing to fit with the data or being unworkably complex, there are many equally justifiable alternatives. While the Greeks' assumption that (unobservable) Homeric gods exist is false, and our supposition of (unobservable) electromagnetic waves is true, both are to be justified solely by their ability to explain our observations.Quine concluded his "

Two Dogmas of Empiricism " as follows:"As an empiricist I continue to think of the conceptual scheme of science as a tool, ultimately, for predicting future experience in the light of past experience. Physical objects are conceptually imported into the situation as convenient intermediaries not by definition in terms of experience, but simply as irreducible posits comparable, epistemologically, to the gods of

Homer . . . For my part I do, qua lay physicist, believe in physical objects and not in Homer's gods; and I consider it a scientific error to believe otherwise. But in point of epistemological footing, the physical objects and the gods differ only in degree and not in kind. Both sorts of entities enter our conceptions only as cultural posits".Quine's ontological

relativism (evident in the passage above) led him to agree withPierre Duhem that for any collection of empirical evidence, there would always be many theories able to account for it. However, Duhem'sholism is much more restricted and limited than Quine's. For Duhem, underdetermination applies only tophysics or possibly tonatural science , while for Quine it applies to all of human knowledge. Thus, while it is possible to verify or falsify whole theories, it is not possible to verify or falsify individual statements. Almost any particular statements can be saved, given sufficiently radical modifications of the containing theory. For Quine, scientific thought forms a coherent web in which any part could be altered in the light of empirical evidence, and in which no empirical evidence could force the revision of a given part.Quine's writings have led to the wide acceptance of

instrumentalism in thephilosophy of science .**Existence and Its Contrary**The problem of non-referring names is an old puzzle in philosophy, which Quine captured eloquently when he wrote,

"A curious thing about the ontological problem is its simplicity. It can be put into three Anglo-Saxon monosyllables: 'What is there?' It can be answered, moreover, in a word--'Everything'--and everyone will accept this answer as true." [

*W.V.O. Quine, "On What There Is"*]*The Review of Metaphysics*, New Haven 1948, 2, 21More directly, the controversy goes, "How can we talk about

Pegasus ? To what does the word 'Pegasus' refer? If our answer is, 'Something,' then we seem to believe in mystical entities; if our answer is, 'nothing', then we seem to talk about nothing and what sense can be made of this? Certainly when we said that Pegasus was a mythological winged horse we make sense, and moreover we speak the truth! If we speak the truth, this must be truth*about something*. So we cannot be speaking of nothing." To cast the problem in logic, how can we make sense of the sentence "Pegasus does not exist," which would generalize into the form (∃x)(x does not exist)?Quine resists the temptation to say that non-referring terms are meaningless for reasons made clear above. Instead he tells us that we must first determine whether our terms refer or not before we know the proper way to understand them. However,

Czeslaw Lejewski criticizes this belief for reducing the matter to empirical discovery when it seems we should have a formal distinction between referring and non-referring terms or elements of our domain. He writes further, "This state of affairs does not seem to be very satisfactory. The idea that some of our rules of inference should depend on empirical information, which may not be forthcoming, is so foreign to the character of logical inquiry that a thorough re-examination of the two inferences [existential generalization and universal instantiation] may prove worth our while." He then goes on to offer a description offree logic , which he claims accommodates an answer to the problem.Lejewski then points out that free logic additionally can handle the problem of the empty set for statements like $forall\; xFx\; ightarrow\; exists\; xFx$. Quine had considered the problem of the empty set unrealistic, which left Lejewski unsatisfied. [

*Czeslaw Lejewski, "Logic and Existence"*]*British Journal for the Philosophy of Science*Vol. 5 (1954-5), pp. 104-119**Logic**Over the course of his career, Quine published a number of technical and expository papers on formal logic, a number of which are reprinted in his "Selected Logic Papers" and in "The Ways of Paradox".

Quine confined logic to classic bivalent

first-order logic , hence to truth and falsity under any (nonempty)universe of discourse . Hence the following were not logic for Quine:

* Higher order logic and set theory. He famously referred tohigher order logic as "set theory in disguise";

* Much of "Principia Mathematica " included in logic was not logic for Quine.

* Formal systems involvingintension al notions, especially modality. Quine was especially hostile to modal logic withquantification , a battle he largely lost whenSaul Kripke 's possible worlds semantics became canonical formodal logic s.Quine wrote three undergraduate texts on logic:

* "Elementary Logic". While teaching an introductory course in 1940, Quine discovered that extant texts for philosophy students did not do justice toquantification theory orfirst-order predicate logic . Quine wrote this book in 6 weeks as anad hoc solution to his teaching needs.* "Methods of Logic". The four editions of this book resulted from a more advanced undergraduate course in logic Quine taught from the end of WWII until his 1978 retirement.

*"Philosophy of Logic". A concise and witty undergraduate treatment of a number of Quinian themes, such as the prevalence of use-mention confusions, the dubiousness of quantified modal logic, and the non-logical character of higher-order logic.

"Mathematical Logic" is based on Quine's graduate teaching during the 1930s and 40s. It shows that much of what "

Principia Mathematica " took more than 1000 pages to say can be said in 250 pages. The proofs are concise, even cryptic. The last chapter, onGodel's incompleteness theorem of andTarski's indefinability theorem , along with the article Quine (1946), became a launching point forRaymond Smullyan 's later lucid exposition of these and related results.Quine's work in logic gradually became dated in some respects. Techniques he did not teach and discuss include

analytic tableau x,recursive function s, andmodel theory . His treatment ofmetalogic left something to be desired. For example, "Mathematical Logic" does not include any proofs ofsoundness andcompleteness . Early in his career, the notation of his writings on logic was often idiosyncratic. His later writings nearly always employed the now-dated notation of "Principia Mathematica ". Set against all this are the simplicity of his preferred method (as exposited in his "Methods of Logic") for determining the satisfiability of quantified formulas, the richness of his philosophical and linguistic insights, and the fine prose in which he expressed them.Most of Quine's original work in formal logic from 1960 onwards was on variants of his

predicate functor logic , one of several ways that have been proposed for doing logic withoutquantifier s. For a comprehensive treatment of predicate functor logic and its history, see Quine (1976). For an introduction, see chpt. 45 of his "Methods of Logic".Quine was very warm to the possibility that formal logic would eventually be applied outside of philosophy and mathematics. He wrote several papers on the sort of

Boolean algebra employed inelectrical engineering , and withEdward J. McCluskey , devised theQuine-McCluskey algorithm of reducingBoolean equation s to a minimum covering sum ofprime implicant s.**et theory**While his contributions to logic include elegant expositions and a number of technical results, it is in

set theory that Quine was most innovative. He always maintained that mathematics required set theory and that set theory was quite distinct from logic. He flirted withNelson Goodman 'snominalism for a while, but backed away when he failed to find a nominalist grounding of mathematics.Over the course of his career, Quine proposed three variants of axiomatic set theory, each including the

axiom of extensionality :*

New Foundations , NF, creates and manipulates sets using a single axiom schema for set admissibility, namely an axiom schema of stratified comprehension, whereby all individuals satisfying a stratified formula compose a set. A stratified formula is one allowed bytype theory would allow, were theontology to include types. However, Quine's set theory do not feature types. The metamathematics of NF are curious. NF allows many "large" sets the now-canonicalZFC set theory does not allow, even sets for which theaxiom of choice does not hold. Since the axiom of choice holds for all finite sets, the failure of this axiom in NF proves that NF includes infinite sets. The (relative) consistency of NF is an open question. A modification of NF, NFU, due to R. B. Jensen and admittingurelement s (entities that can be members of sets but that lack elements), turns out to be consistent relative toPeano arithmetic , thus vindicating the intuition behind NF. NF and NFU are the only Quinian set theories with a following. For a derivation of foundational mathematics in NF, see Rosser (1953);

*The set theory of "Mathematical Logic" is NF augmented by theproper class es ofVon Neumann–Bernays–Gödel set theory , except axiomatized in a much simpler way;

* The set theory of "Set Theory and Its Logic" does away with stratification and is almost entirely derived from a single axiom schema. Quine derived the foundations of mathematics once again. This book includes the definitive exposition of Quine's theory of virtual sets and relations, and surveyed axiomatic set theory as it stood circa 1960. However, Fraenkel, Bar-Hillel and Levy (1973) do a better job of surveying set theory as it stood at mid-century.All three set theories admit a universal class, but since they are free of any

hierarchy oftypes , they have no need for a distinct universal class at each type level.Quine's set theory and its background logic were driven by a desire to minimize posits; each innovation is pushed as far as it can be pushed before further innovations are introduced. For Quine, there is but one connective, the

Sheffer stroke , and one quantifier, theuniversal quantifier . All polyadicpredicate s can be reduced to one dyadic predicate, interpretable as set membership. His rules of proof were limited tomodus ponens and substitution. His preferred conjunction to eitherdisjunction or theconditional , becauseconjunction has the least semantic ambiguity. He was delighted to discover early in his career that all of first order logic and set theory could be grounded in a mere two primitive notions:set abstraction andinclusion . For an elegant introduction to the parsimony of Quine's approach to logic, see his "New Foundations for Mathematical Logic," ch. 5 in his "From a Logical Point of View".**Quine's Reductio of the Library of Babel**In one short essay, Quine noted the interesting fact that the

Library of Babel is finite (i.e., we will theoretically come to a point in history where everything has been written), and that the Library of Babel can be constructed in its entirety simply by writing a dot on one piece of paper and a dash on another. These two sheets of paper could then be alternated back and forth at random by the bearer, who would be able to read the resulting text in binary as he flipped them back and forth. This shows that the Library of Babel is actually quite manageable, and that everyone with paper and a pencil can create it. [*[*]*http://jubal.westnet.com/hyperdiscordia/universal_library.html "Universal Library"*] by W.V.O Quine**In popular culture*** A

computer program whose output is its source code is named a "quine" after W.V. Quine.

* Therock and roll guitaristRobert Quine was his nephew.

* The book "Armadillo" by William Boyd contains a quote from W.V. Quine.**Writings by Quine****elected books***1951 (1940). "Mathematical Logic". Harvard Univ. Press. ISBN 0-674-55451-5.

*1966. "Selected Logic Papers". New York: Random House.

*1970. "The Web of Belief". New York: Random House.

*1980 (1941). "Elementary Logic". Harvard Univ. Press. ISBN 0-674-24451-6.

*1982 (1950). "Methods of Logic". Harvard Univ. Press.

*1980 (1953). "From a Logical Point of View". Harvard Univ. Press. ISBN 0-674-32351-3. Contains " [*http://www.ditext.com/quine/quine.html Two dogmas of Empiricism.*] "

*1960 "Word and Object". MIT Press; ISBN 0-262-67001-1. The closest thing Quine wrote to a philosophical treatise. Chpt. 2 sets out theindeterminacy of translation thesis.

*1976 (1966). "The Ways of Paradox". Harvard Univ. Press.

*1969 "Ontological Relativity and Other Essays". Columbia Univ. Press. ISBN 0-231-08357-2. Contains chapters onontological relativity ,naturalized epistemology andnatural kind s.

*1969 (1963). "Set Theory and Its Logic". Harvard Univ. Press.

*1985 "The Time of My Life - An Autobiography". Cambridge, The MIT Press. ISBN 0-262-17003-5. 1986: Harvard Univ. Press.

*1986 (1970). "The Philosophy of Logic". Harvard Univ. Press.

*1987 "Quiddities: An Intermittently Philosophical Dictionary". Harvard Univ. Press. ISBN 0-14-012522-1. A work of essays, many subtly humorous, for lay readers, very revealing of the breadth of his interests.

*1992 (1990). "Pursuit of Truth". Harvard Univ. Press. A short, lively synthesis of his thought for advanced students and general readers not fooled by its simplicity. ISBN 0-674-73951-5.**Important articles***1946, "Concatenation as a basis for arithmetic." Reprinted in his "Selected Logic Papers". Harvard Univ. Press.

*1948, "On What There Is ," "Review of Metaphysics". Reprinted in his 1953 "From a Logical Point of View". Harvard University Press.

*1951, "Two Dogmas of Empiricism ," "The Philosophical Review 60": 20-43. Reprinted in his 1953 "From a Logical Point of View". Harvard University Press.

*1956, "Quantifiers and Propositional Attitudes," "Journal of Philosophy 53". Reprinted in his 1976 "Ways of Paradox". Harvard Univ. Press: 185-96.

*1969, "Epistemology Naturalized " in "Ontological Relativity and Other Essays". New York: Columbia University Press: 69-90.**About Quine*** Gibson, Roger F., 1982/86. "The Philosophy of W.V. Quine: An Expository Essay". Tampa: University of South Florida.

*--------, 1988. "Enlightened Empiricism: An Examination of W. V. Quine's Theory of Knowledge" (Tampa: University of South Florida.

*--------, ed., 2004. "The Cambridge Companion to Quine". Cambridge University Press.

*--------, 2004. "Quintessence: Basic Readings from the Philosophy of W. V. Quine". Harvard Univ. Press.

*-------- and Barrett, R., eds., 1990. "Perspectives on Quine". Oxford: Blackwell.

*Paul Gochet , 1978. "Quine en perspective", Paris, Flammarion.

*Ivor Grattan-Guinness , 2000. "The Search for Mathematical Roots 1870-1940". Princeton University Press.

* Hahn, L. E., and Schilpp, P. A., eds., 1986. "The Philosophy of W. V. O. Quine" (The Library of Living Philosophers). Open Court.

* Köhler, Dieter, 1999/2003. " [*http://www.ub.uni-heidelberg.de/archiv/3548 Sinnesreize, Sprache und Erfahrung: eine Studie zur Quineschen Erkenntnistheorie*] ". Ph.D. thesis, Univ. of Heidelberg.

*cite book |last=Orenstein |first=Alex |title=W.V. Quine |year=2002 |publisher=Princeton University Press

*John Barkley Rosser , 1953.

* Valore, Paolo, 2001. "Questioni di ontologia quineana", Milano: Cusi.**References****ee also***

Douglas Hofstadter

*Duhem-Quine thesis

*Hold come what may

*Hold more stubbornly at least

*Indeterminacy of translation

*predicate functor logic

*Quine-McCluskey algorithm

*Quine (computing)

*Quine's paradox

*Schock Prize

*Two Dogmas of Empiricism **External links*** [

*http://www.wvquine.org/ Willard Van Orman Quine—Philosopher and Mathematician.*] By his son; includes complete bibliography of Quine's writings, students, art, memorials, and list of travels

* Obituary fromThe Guardian : " [*http://www.guardian.co.uk/obituaries/story/0,,416245,00.html Philosopher whose revolutionary ideas challenged the accepted way we look at ourselves and our universe*] "

* Text of " [*http://www.ditext.com/quine/quine.html Two Dogmas of Empiricism*] "

* Text of " [*http://sveinbjorn.org/simple_theories_of_a_complex_world On Simple Theories Of A Complex World*] "Persondata

NAME = Quine, Willard Van Orman

ALTERNATIVE NAMES =

SHORT DESCRIPTION = American philosopher

DATE OF BIRTH = June 25, 1908

PLACE OF BIRTH = Akron, Ohio, United States

DATE OF DEATH = December 25, 2000

PLACE OF DEATH = Boston, Massachusetts, United States

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**Willard van Orman Quine**— (* 25. Juni 1908 in Akron, Ohio; † 25. Dezember 2000 in Boston, Massachusetts) war ein amerikanischer Philosoph und Logiker. Quine gilt als bedeutender Vertreter der Analytischen Philosophie und des philosophischen Naturalismus.… … Deutsch Wikipedia**Willard van Orman Quine**— Pour les articles homonymes, voir Quine. Willard Van Orman Quine (25 juin 1908 25 décembre 2000) est un philosophe et logicien américain, principal représentant de la philosophie analytique. Il est notamment l auteur de Les deux dogmes de l… … Wikipédia en Français**Willard van orman quine**— Pour les articles homonymes, voir Quine. Willard Van Orman Quine (25 juin 1908 25 décembre 2000) est un philosophe et logicien américain, principal représentant de la philosophie analytique. Il est notamment l auteur de Les deux dogmes de l… … Wikipédia en Français**Willard van Orman Quine**— Saltar a navegación, búsqueda Willard van Orman Quine (Akron, Ohio; 25 de junio de 1908 Boston, Massachusetts; 25 de diciembre de 2000), filósofo estadounidense, reconocido por su trabajo en lógica matemática y sus contribuciones al pragmatismo… … Wikipedia Español**Willard Van Orman Quine**— (Akron, Ohio; 25 de junio de 1908 Boston, Massachusetts; 25 de diciembre de 2000) fue un filósofo estadounidense, reconocido por su trabajo en lógica matemática y sus contribuciones al pragmatismo como una teoría del conocimiento. Contenido 1… … Wikipedia Español**Willard Van Orman Quine**— (1908 2000), filósofo estadounidense, reconocido por su trabajo en lógica matemática y sus contribuciones al pragmatismo como una teoría del conocimiento. Nacido en Akron, Ohio, fue educado en el Oberlin College y en la Universidad de Harvard,… … Enciclopedia Universal**Willard Van Orman Quine**— Pass 1975 Willard Van Orman Quine (* 25. Juni 1908 in Akron, Ohio; † 25. Dezember 2000 in Boston, Massachusetts) war ein US amerikanischer Philosoph und Logiker. Quine gilt als bedeutender Vertreter der … Deutsch Wikipedia**Willard Van Orman Quine**— Pour les articles homonymes, voir Quine. Willard Van Orman Quine (25 juin 1908 25 décembre 2000) est un philosophe et logicien américain, l un des principaux représentants de la philosophie analytique. Il est notamment l auteur de Les deux dogmes … Wikipédia en Français**Willard Van Orman Quine**— noun United States philosopher and logician who championed an empirical view of knowledge that depended on language (1908 2001) • Syn: ↑Quine, ↑W. V. Quine • Instance Hypernyms: ↑philosopher, ↑logician, ↑logistician … Useful english dictionary**Willard van Orman Quine**— Født 1908. Amerikansk filosof, der har søgt at forene pragmatismen med den logiske positivisme og som har aflivet mange af dogmerne inden for den tidlige analytiske filosofi … Danske encyklopædi