A

• abstract objects (Gideon Rosen)
• action (George Wilson)
• actualism (Christopher Menzel)
• Aegidius Romanus -- see Giles of Rome
• Aenesidemus -- see skepticism: ancient
• aesthetics
  • aesthetic judgment (Nick Zangwill)
• affirmative action (Robert Fullinwider)
• Agrippa -- see skepticism: ancient
• Albert of Saxony (Joël Biard)
• Alyngton, Robert (Alessandro Conti)
• analogy
  • medieval theories of (E. Jennifer Ashworth)
• Anaxarchus -- see Pyrrho
• animal consciousness -- see consciousness: animal
• Anselm, Saint [Anselm of Bec, Anselm of Canterbury] (Thomas Williams)
• Aquinas, Saint Thomas (Ralph McInerny)
• Aristotle
  • ethics (Richard Kraut)
  • logic (Robin Smith)
  • metaphysics (S. Marc Cohen)
  • political theory (Fred Miller)
  • psychology (Christopher Shields)
  • rhetoric (Christof Rapp)
• artifact (Risto Hilpinen)
• attributes -- see properties
• Augustine, Saint (Michael Mendelson)
• Auriol [Aureol, Aureoli], Peter (Russell L. Friedman)
• Austin, John (Brian Bix)
• automated reasoning -- see reasoning: automated
• autonomy
  • personal (Sarah Buss)

B

• Bain, Alexander -- see Scottish Philosophy: in the 19th century
• basing relation, epistemic (Keith Allen Korcz)
• Bauer, Bruno (Douglas Moggach)
• Bayle, Pierre (Thomas M. Lennon)
• Beattie, James -- see Scottish Philosophy: in the 18th Century
• behaviorism (George Graham)
• being -- see existence
• being and becoming -- see time
  • in modern physics -- see space and time: being and becoming in modern physics
• biology
  • notion of self (Alfred Tauber)
  • teleological notions in -- see teleology: teleological notions in biology
• Blair, Hugh -- see Scottish Philosophy: in the 18th Century
• Boolean algebra
  • the mathematics of (J. Donald Monk)
• Bosanquet, Bernard (William Sweet)
• Boyle, Robert (J. J. MacIntosh)
• Bradley, Francis Herbert (Stewart Candlish)
• Brentano, Franz (Wolfgang Huemer)
  • theory of judgement (Johannes Brandl)
• Brown, Thomas -- see Scottish Philosophy: in the 19th century
• Buridan, John [Jean] (Jack Zupko)
• Burnet, James [Lord Monboddo] -- see Scottish Philosophy: in the 18th Century

C

• Caird, Edward -- see Scottish Philosophy: in the 19th century
• Cambridge Platonists (Sarah Hutton)
• Campbell, George -- see Scottish Philosophy: in the 18th Century
• category theory (Jean-Pierre Marquis)
• causation
  • backward (Jan Faye)
  • causal processes (Phil Dowe)
  • counterfactual theories of (Peter Menzies)
  • in the law (Antony Honoreé)
  • and manipulability (James Woodward)
  • medieval theories of (Graham White)
  • the metaphysics of (Jonathan Schaffer)
  • probabilistic (Christopher Hitchcock)
• change (Chris Mortensen)
• character, moral (Marcia Homiak)
• childhood, the philosophy of (Gareth Matthews)
• children, philosophy for (Michael Pritchard)
• Christian theology, philosophy and (Michael Murray)
• Church-Turing Thesis (B. Jack Copeland)
• Church's Thesis -- see Church-Turing Thesis
• civil rights (Andrew Altman)
• cognitive science (Paul Thagard)
• color (Barry Maund)
• common knowledge (Peter Vanderschraaf)
• communitarianism (Daniel Bell)
• comparative philosophy
  • Chinese and Western (David Wong)
• composition, the vagueness of -- see problem of the many
• computer ethics
  • basic concepts and historial overview (Terrell Bynum)
• computing
  • modern history of (B. Jack Copeland)
• condemnation of 1277 (Hans Thijssen)
• Condillac, Étienne Bonnot de (Lorne Falkenstein)
• conditionals (Dorothy Edgington)
• Confucius (Jeffrey Riegel)
• connectionism (James Garson)
• conscience
  • medieval theories of (Douglas Langston)
• consciousness
  • animal (Colin Allen)
  • higher-order theories (Peter Carruthers)
  • and intentionality (Charles Siewert)
  • representational theories of (William Lycan)
  • unity of (Andrew Brook)
• constitutionalism (Wil Waluchow)
• continuant -- see change
• contractarianism (Ann Cudd)
• Conway, Lady Anne (Sarah Hutton)
• cosmology
  • methodological debates in the 1930s and 1940s (George Gale)
  • and theology (John Leslie)
• cosmopolitanism (Pauline Kleingeld and Eric Brown)
• criminal law, theories of (Antony Duff)
• Cudworth, Ralph -- see Cambridge Platonists
• Culverwell, Nathaniel -- see Cambridge Platonists
• Curry's paradox (JC Beall)

D

• Dante Alighieri (Winthrop Wetherbee)
• Daoism -- see Taoism
• Davidson, Donald (Jeff Malpas)
• death (Steven Luper)
• demonstration
  • Aristotle's theory of -- see Aristotle: logic
• demonstratives -- see indexicals
• Descartes, René
  • epistemology (Lex Newman)
  • life and works (Kurt Smith)
  • modal metaphysics (David Cunning)
  • ontological argument (Lawrence Nolan)
• desert (Owen McLeod)
• Desgabets, Robert (Patricia Easton)
• determinates vs. determinables (David H. Sanford)
• determinism
  • causal (Carl Hoefer)
• diagrams (Sun-Joo Shin and Oliver Lemon)
• dialetheism [dialethism] (Graham Priest)
• disjunction (Ray Jennings)
• distributive justice -- see justice: distributive
• divine command theory -- see voluntarism, theological
• divine illumination (Robert Pasnau)
• doing vs. allowing harm (Frances Howard-Snyder)
• Dunbar, James -- see Scottish Philosophy: in the 18th Century
• Duns Scotus, John (Thomas Williams)

E

• Edwards, Jonathan (William Wainwright)
• egalitarianism (Richard Arneson)
• egoism (Robert Shaver)
• Einstein, Albert
  • the hole argument -- see space and time: the hole argument
• Elias (Christian Wildberg)
• emergent properties (Timothy O'Connor and Hong Yu Wong)
• Emerson, Ralph Waldo (Russell Goodman)
• emotion (Ronald de Sousa)
• envy (Justin D'Arms)
• epiphenomenalism (William Robinson)
• epistemic basing relation -- see basing relation, epistemic
• epistemic closure principle (Steven Luper)
• epistemology
  • Bayesian (William Talbott)
  • evolutionary (Michael Bradie and William Harms)
  • feminist -- see feminism, interventions: feminist epistemology and philosophy of science
  • moral -- see moral epistemology
  • naturalized (Richard Feldman)
  • social (Alvin Goldman)
  • virtue (John Greco)
• epsilon calculus (Jeremy Avigad and Richard Zach)
• equality (Stefan Gosepath)
  • of opportunity (Richard Arneson)
• equivalence of mass and energy (Francisco Flores)
• ethics
  • computer -- see computer ethics: basic concepts and historial overview
  • environmental (Andrew Brennan and Yeuk-Sze Lo)
  • feminist -- see feminism, interventions: feminist ethics
  • natural law tradition (Mark Murphy)
• euthanasia
  • voluntary (Robert Young)
• events (Roberto Casati and Achille Varzi)
• evil, problem of (Michael Tooley)
• evolutionary game theory -- see game theory: evolutionary
• existence (Barry Miller)
• experimentation
  • in physics -- see physics: experiment in
• exploitation (Alan Wertheimer)
• extrinsic -- see intrinsic vs. extrinsic properties

F

• fallacies -- see logic: informal
• fatalism (Hugh Rice)
• federalism (Andreas Føllesdal)
• feminism, approaches to
  • intersection of pragmatism and continental philosophy (Shannon Sullivan)
• feminism, interventions
  • feminist epistemology and philosophy of science (Elizabeth Anderson)
  • feminist ethics (Rosemarie Tong)
  • feminist history of philosophy (Charlotte Witt)
• feminism, topics (Sally Haslanger and Nancy Tuana)
  • feminist perspectives on the self (Diana Meyers)
• Ferguson, Adam -- see Scottish Philosophy: in the 18th Century
• Ferrier, James -- see Scottish Philosophy: in the 19th century
• Feyerabend, Paul (John Preston)
• Fichte, Johann Gottlieb (Dan Breazeale)
• fictionalism
  • modal (Daniel Nolan)
• Fitch's paradox of knowability (Berit Brogaard and Joe Salerno)
• fitness (Alexander Rosenberg and Frederic Bouchard)
• folk psychology
  • as mental simulation (Robert M. Gordon)
  • as a theory (Ian Ravenscroft)
• Francis of Marchia (Christopher Schabel)
• freedom
  • of speech (David van Mill)
• free will (Timothy O'Connor)
• Frege, Gottlob (Edward N. Zalta)
  • logic, theorem, and foundations for arithmetic (Edward N. Zalta)
• function
  • in biology -- see teleology: teleological notions in biology

G

• Gadamer, Hans-Georg (Jeff Malpas)
• game theory (Don Ross)
  • evolutionary (J. McKenzie Alexander)
• general relativity
  • early philosophical interpretations of (Thomas A. Ryckman)
• geometry
  • finitism in (Jean-Paul Van Bendegem)
  • in the 19th century (Roberto Torretti)
• Gerard, Alexander -- see Scottish Philosophy: in the 18th Century
• German Philosophy
  • in the 18th century, prior to Kant (Brigitte Sassen)
• Gersonides (Tamar Rudavsky)
• Giles of Rome (Roberto Lambertini)
• globalization (William Scheuerman)
• God, arguments for the existence of
  • Descartes' ontological -- see Descartes, René: ontological argument
  • ontological -- see ontological arguments
• Godfrey of Fontaines (John Wippel)
• Godwin, William (Mark Philp)
• Green, Thomas Hill (Colin Tyler)
• Gregory of Rimini (Christopher Schabel)

H

• Hamann, Johann Georg (Gwen Griffith-Dickson)
• Hamilton, William -- see Scottish Philosophy: in the 19th century
• Hartley, David (Richard Allen)
• Hartshorne, Charles (Dan Dombrowski)
• Hegel, Georg Wilhelm Friedrich (Paul Redding)
• Herder, Johann Gottfried von (Michael Forster)
• Heytesbury, William (John Longeway)
• Hobbes, Thomas
  • moral and political philosophy (Sharon A. Lloyd)
• Holbach, Paul-Henri Thiry (Baron) d' (Michael LeBuffe)
• holes (Roberto Casati and Achille Varzi)
• Holkot [Holcot], Robert (Hester Gelber)
• Home, Henry [Lord Kames] -- see Scottish Philosophy: in the 18th Century
• homosexuality (Brent Pickett)
• humanism, civic (Athanasios Moulakis)
• human rights -- see rights: human
• Hume, David (William Edward Morris)
• Husserl, Edmund (Christian Beyer)
• Hutcheson, Francis -- see Scottish Philosophy: in the 18th Century
• Hutton, James -- see Scottish Philosophy: in the 18th Century

I

• identity
  • of indiscernibles (Peter Forrest)
  • personal -- see personal identity
  • relative (Harry Deutsch)
• identity politics (Cressida Heyes)
• identity theory of mind (J. J. C. Smart)
• imagery, mental -- see mental imagery
• immutability (Brian Leftow)
• impartiality (Troy Jollimore)
• incompatibilism
  • (nondeterministic) theories of free will (Randolph Clarke)
• indexicals (David Braun)
• inequality -- see equality
• inertial systems -- see space and time: inertial frames
• informal logic -- see logic: informal
• insolubles [= insolubilia] (Paul Vincent Spade)
• integrity (Damian Cox, Marguerite La Caze, and Michael Levine)
• intentionality
  • consciousness and -- see consciousness: and intentionality
• intrinsic vs. extrinsic properties (Brian Weatherson)

J

• Jacobi, Friedrich Heinrich (George di Giovanni)
• James, William (Russell Goodman)
• judgment
  • aesthetic -- see aesthetics: aesthetic judgment
• justice
  • distributive (Julian Lamont)
  • as a virtue (Michael Slote)
• justification, epistemic
  • foundationalist theories of (Richard Fumerton)
• justification, political
  • public (Fred D'Agostino)

K

• Kierkegaard, Søren (William McDonald)
• killing vs. letting die -- see doing vs. allowing harm
• Kilvington, Richard (Elzbieta Jung-Palczewska)
• knowledge
  • analysis of (Matthias Steup)
  • self- -- see self-knowledge
• Kochen-Specker theorem -- see quantum mechanics: Kochen-Specker theorem

L

• language of thought hypothesis (Murat Aydede)
• Laozi (Alan Chan)
• law
  • and ideology (Christine Sypnowich)
  • and language (Timothy Endicott)
• learning theory, formal (Oliver Schulte)
• legal philosophy
  • economic analysis of law (Lewis Kornhauser)
• legal positivism -- see nature of law: legal positivism
• legal punishment -- see punishment, legal
• legal reasoning
  • interpretation and coherence (Julie Dickson)
• legal rights (Kenneth Campbell)
• Le Grand, Antoine (Patricia Easton)
• Leibniz, Gottfried Wilhelm
  • on the problem of evil (Michael Murray)
  • philosophy of mind (Mark Kulstad and Laurence Carlin)
• liberalism (Gerald Gaus and Shane D. Courtland)
• libertarianism (Peter Vallentyne)
• liberty
  • positive and negative (Ian Carter)
• lifeworld -- see Husserl, Edmund
• Locke, John (William Uzgalis)
• logic
  • classical (Stewart Shapiro)
  • fuzzy (Petr Hajek)
  • and games (Wilfrid Hodges)
  • infinitary (John L. Bell)
  • informal (Leo Groarke)
  • intuitionistic (Joan Moschovakis)
  • many-valued (Siegfried Gottwald)
  • modal (James Garson)
  • non-monotonic (Aldo Antonelli)
  • paraconsistent (Graham Priest and Koji Tanaka)
  • relevance (Edwin Mares)
  • substructural (Greg Restall)
  • temporal (Antony Galton)
• logical constructions (Bernard Linsky)
• logical form (Paul Pietroski)

M

• Maimon, Salomon (Peter Thielke and Yitzhak Melamed)
• Malebranche, Nicolas (Tad Schmaltz)
• Mally, Ernst
  • deontic logic (Gert-Jan Lokhorst)
• Maritain, Jacques (William Sweet)
• Marsilius of Inghen (Maarten Hoenen)
• Masham, Lady Damaris (Sarah Hutton)
• mass/energy equivalence -- see equivalence of mass and energy
• mathematics
  • constructive (Douglas Bridges)
  • inconsistent (Chris Mortensen)
• mathematics, philosophy of
  • indispensability arguments in the (Mark Colyvan)
• measurement
  • in quantum theory -- see quantum theory: measurement in
• medieval philosophy
  • literary forms of (Eileen Sweeney)
• medieval theories
  • analogy -- see analogy: medieval theories of
  • causation -- see causation: medieval theories of
  • conscience -- see conscience: medieval theories of
  • modality -- see modality: medieval theories of
  • practical reason -- see practical reason: medieval theories of
  • properties of terms -- see terms, properties of: medieval theories of
  • relations -- see relations: medieval theories of
• memory (John Sutton)
• Mendelssohn, Moses (Daniel Dahlstrom)
• mental content
  • externalism about (Joe Lau)
  • narrow (Curtis Brown)
  • nonconceptual (José Bermúdez)
• mental illness (Christian Perring)
• mental imagery (Nigel Thomas)
• mental representation (David Pitt)
• metaethics
  • moral epistemology -- see moral epistemology
  • moral non-naturalism -- see non-naturalism, moral
  • moral particularism -- see moral particularism
  • moral skepticism -- see skepticism: moral
• Mill, Harriet Taylor (Dale E. Miller)
• Mill, John Stuart (Fred Wilson)
• mind
  • identity theory of -- see identity theory of mind
• miracles (Michael Levine)
• modality
  • medieval theories of (Simo Knuuttila)
• modal logic -- see logic: modal
• model theory (Wilfrid Hodges)
  • first-order (Wilfrid Hodges)
• Mohism (Chris Fraser)
• moral character -- see character, moral
• moral dilemmas (Terrance McConnell)
• moral epistemology (Richmond Campbell)
• morality, definition of (Bernard Gert)
• moral non-naturalism -- see non-naturalism, moral
• moral particularism (Jonathan Dancy)
• moral responsibility (Andrew Eshleman)
• moral skepticism -- see skepticism: moral
• More, Henry -- see Cambridge Platonists
• multiple realizability (John Bickle)

N

• nationalism (Nenad Miscevic)
• naturalism in legal philosophy (Brian Leiter)
• natural law
  • tradition in ethics -- see ethics: natural law tradition
• nature of law (Andrei Marmor)
  • legal positivism (Leslie Green)
  • pure theory of law (Andrei Marmor)
• neuroscience, philosophy of (John Bickle and Peter Mandik)
• Nicholas of Autrecourt [de Altricuria, Autricuria, Ultricuria, Autricort] (Hans Thijssen)
• Nietzsche, Friedrich (Robert Wicks)
• noema -- see Husserl, Edmund
• non-naturalism, moral (Michael Ridge)

O

• object (Henry Laycock)
• obligations
  • special (Diane Jeske)
• Ockham [Occam], William (Paul Vincent Spade)
• Olivi, Peter John (Robert Pasnau)
• omnipotence (Joshua Hoffman and Gary Rosenkrantz)
• ontological arguments (Graham Oppy)
• original position (Fred D'Agostino)

P

• panpsychism (William Seager)
• pantheism (Michael Levine)
• paradox
  • Curry -- see Curry's paradox
  • Fitch's paradox of knowability -- see Fitch's paradox of knowability
  • Russell's paradox -- see Russell's paradox
  • St. Petersburg paradox (Robert Martin)
  • Zeno's paradoxes -- see Zeno's paradoxes
• parenthood and procreation (Tim Bayne and Avery Kolers)
• Pascal's wager (Alan Hájek)
• paternalism (Gerald Dworkin)
• Paul of Venice (Alessandro Conti)
• Peirce, Benjamin (Ivor Grattan-Guinness and Alison Walsh)
• Peirce, Charles Sanders (Robert Burch)
  • logic (Eric Hammer)
• Penbygull, William (Alessandro Conti)
• perception
  • epistemological problems of (Laurence BonJour)
• personal identity (Eric T. Olson)
• persons -- see personal identity
• Peter of Spain [= Petrus Hispanus] (Joke Spruyt)
• Philip the Chancellor (Colleen McCluskey)
• Philoponus (Christian Wildberg)
• physicalism (Daniel Stoljar)
• physics
  • experiment in (Allan Franklin)
  • holism and nonseparability (Richard Healey)
  • intertheory relations in (Robert Batterman)
  • Reichenbach's common cause principle (Frank Arntzenius)
  • structuralism in (Heinz-Juergen Schmidt)
• Plato
  • Utopia (Chris Bobonich)
• Popper, Karl (Stephen Thornton)
• practical reason
  • medieval theories of (Anthony Celano)
• predicate calculus -- see logic: classical
• Principia Mathematica (A. D. Irvine)
• Prior, Arthur (B. Jack Copeland)
• prisoner's dilemma (Steven Kuhn)
• privacy (Judith DeCew)
• private language (Stewart Candlish)
• probability, interpretations of (Alan Hájek)
• problem of the many (Brian Weatherson)
• process philosophy (Nicholas Rescher)
• procreation -- see parenthood and procreation
• properties (Chris Swoyer)
  • emergent -- see emergent properties
• propositional attitude reports (Thomas McKay)
• propositions
  • singular (Greg Fitch)
  • structured (Jeffrey C. King)
• providence, divine (Hugh J. McCann)
• punishment, legal (Antony Duff)
• Pyrrho (Richard Bett)
• Pyrrhonism -- see skepticism: ancient

Q

• qualia (Michael Tye)
  • knowledge argument (Martine Nida-Rümelin)
• quantum mechanics (Jenann Ismael)
  • Bohmian mechanics (Sheldon Goldstein)
  • collapse theories (Giancarlo Ghirardi)
  • Copenhagen interpretation of (Jan Faye)
  • Everett's relative-state formulation of (Jeffrey Barrett)
  • Kochen-Specker theorem (Carsten Held)
  • many-worlds interpretation of (Lev Vaidman)
  • modal interpretations of (Michael Dickson)
  • relational (Federico Laudisa and Carlo Rovelli)
• quantum theory
  • identity and individuality in (Steven French)
  • measurement in (Henry Krips)
  • quantum entanglement and information (Jeffrey Bub)
  • quantum logic and probability theory (Alexander Wilce)
  • uncertainty principle in -- see Uncertainty Principle

R

• Ramsay, Allan -- see Scottish Philosophy: in the 18th Century
• rationality
  • Bayesian -- see epistemology: Bayesian
  • historicist theories of (Carl Matheson)
• realism (Alexander Miller)
  • scientific -- see scientific realism
  • semantic challenges to (Drew Khlentzos)
• reasoning
  • automated (Frederic Portoraro)
• reference (Marga Reimer)
• Reid, Thomas (Gideon Yaffe)
• relations -- see properties
  • medieval theories of (Jeffrey Brower)
• relativism (Chris Swoyer)
• religion
  • epistemology of (Peter Forrest)
• replication (David Hull)
• republicanism (Philip Pettit)
• Richard the Sophister [Ricardus Sophista, Magister abstractionum] (Paul Streveler)
• Ricoeur, Paul (Bernard Dauenhauer)
• rights
  • of children (David William Archard)
  • human (James Nickel)
  • legal -- see legal rights
• rights: civil -- see civil rights
• role obligations -- see obligations: special
• Rorty, Richard (Bjørn Ramberg)
• Rosmini, Antonio (Denis Cleary)
• Russell, Bertrand (A. D. Irvine)
• Russell's paradox (A. D. Irvine)

S

• Santayana, George (Herman Saatkamp)
• scepticism -- see skepticism
• Schelling, Friedrich Wilhelm Joseph von (Andrew Bowie)
• Schleiermacher, Friedrich Daniel Ernst (Michael Forster)
• Schutz, Alfred (Michael Barber)
• scientific knowledge
  • social dimensions of (Helen Longino)
• scientific progress (Ilkka Niiniluoto)
• scientific realism (Richard Boyd)
• Scottish Philosophy
  • in the 18th Century (Alexander Broadie)
  • in the 19th century (Gordon Graham)
• Scotus, John Duns -- see Duns Scotus, John
• secession (Allen Buchanan)
• self
  • feminist perspectives on the -- see feminism, topics: feminist perspectives on the self
• self-knowledge (Brie Gertler)
• Sellars, Wilfrid (Jay Rosenberg)
• set theory (Thomas Jech)
• Shaftesbury, Lord [Anthony Ashley Cooper, 3rd Earl of] (Michael Gill)
• Sharpe, Johannes (Alessandro Conti)
• skepticism (Peter Klein)
  • ancient (Leo Groarke)
  • moral (Walter Sinnott-Armstrong)
• Smith, Adam -- see Scottish Philosophy: in the 18th Century
• Smith, John -- see Cambridge Platonists
• social contract -- see contractarianism
  • contemporary approaches to (Fred D'Agostino)
• sophismata [= sophisms] (Fabienne Pironet)
• Sorites paradox (Dominic Hyde)
• space and time
  • being and becoming in modern physics (Steven Savitt)
  • conventionality of simultaneity (Allen Janis)
  • the hole argument (John Norton)
  • inertial frames (Robert DiSalle)
  • supertasks (Jon Pérez Laraudogoitia)
• species (Marc Ereshefsky)
• Spencer, Herbert (David Weinstein)
• Spinoza, Baruch [Benedict] (Steven Nadler)
  • psychological theory (Michael LeBuffe)
• square of opposition (Terence Parsons)
• statistical physics
  • philosophy of statistical mechanics (Lawrence Sklar)
• Sterry, Peter -- see Cambridge Platonists
• Stewart, Dugald -- see Scottish Philosophy: in the 18th Century
• Stirner, Max (David Leopold)
• Stoicism (Dirk Baltzly)
• structuralism
  • in physics -- see physics: structuralism in
• substructural logics -- see logic: substructural
• supererogation (David Heyd)

T

• Taoism (Chad Hansen)
• Tarski, Alfred
  • truth definitions (Wilfrid Hodges)
• teleology
  • teleological notions in biology (Colin Allen)
• terms, properties of
  • medieval theories of (Stephen Read)
• Thomas of Erfurt (Jack Zupko)
• thought experiments (James R. Brown)
• time (Ned Markosian)
  • the experience and perception of (Robin Le Poidevin)
  • thermodynamic asymmetry in (Craig Callender)
• time travel
  • and modern physics (Frank Arntzenius and Tim Maudlin)
• Timon of Phlius (Richard Bett)
• transcendentalism (Russell Goodman)
• tropes (John Bacon)
• truth
  • coherence theory of (James O. Young)
  • correspondence theory of (Marian David)
  • deflationary theory of (Daniel Stoljar)
  • identity theory of (Stewart Candlish)
  • revision theory of (Eric Hammer)
• truthlikeness (Graham Oddie)
• Turing, Alan (Andrew Hodges)
• Turing machine (Editors at the SEP)
• Turnbull, George -- see Scottish Philosophy: in the 18th Century

U

• Uncertainty Principle (Jan Hilgevoord and Jos Uffink)
• universals -- see properties
  • the medieval problem of (Gyula Klima)

V

• vagueness (Roy Sorensen)
• vagueness of composition -- see problem of the many
• value
  • intrinsic vs. extrinsic (Michael J. Zimmerman)
• veil of ignorance -- see original position
• verisimilitude -- see truthlikeness
• volition -- see free will
• voluntarism, theological (Mark Murphy)

W

• war (Brian Orend)
• well being (Roger Crisp)
• Whewell, William (Laura J. Snyder)
• Whichcote, Benjamin -- see Cambridge Platonists
• Whitehead, Alfred North (A. D. Irvine)
• William of Ockham -- see Ockham, William
• Wittgenstein, Ludwig (Anat Biletzki and Anat Matar)
• Wyclif, John (Alessandro Conti)

X

• Xenophanes (James Lesher)

Y

Z

• Zeno's paradoxes (Nick Huggett)
• Zhuangzi (Harold Roth)