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- I'm entitled to my opinion
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- I problemi della guerra e le vie della pace
- I. A. Richards
- Iain Hamilton Grant
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- Iamblichus (philosopher)
- Ian Bone
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- Ian Thomas Ramsey
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- İbrahim Hakkı Erzurumi
- İbrahim Özdemir
- Ichthyas
- Icon
- Id, ego and super-ego
- Ida Mett
- Idea
- Idea for a Universal History with a Cosmopolitan Purpose
- Idea of Progress
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- Ideal language
- Ideal observer theory
- Ideal speech situation
- Ideal type
- Idealism
- Idealistic pluralism
- Idealistic Studies
- Idealization (science philosophy)
- Idea
- Ideas and Action
- Ideas Have Consequences
- Idée reçue
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- Identity (philosophy)
- Identity formation
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- Identity thesis
- Identityism
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- Ideology
- Ideomotor effect
- Idiolect
- Idios kosmos
- Idol (philosophy)
- Idolon tribus
- Idols of the cave
- Idols of the mind
- Idols of the tribe
- Idomeneus of Lampsacus
- Ietsism
- If
- If-by-whiskey
- If a tree falls in a forest
- If and only if
- Iff
- Ignacio de Arbieto
- Ignacio Ellacuría
- Ignoramus et ignorabimus
- Ignoratio elenchi
- Ignosticism
- Ignotum per ignotius
- Igor Pribac
- Igor Yefimov
- Ihsan
- Ikeda Mitsumasa
- Iki (aesthetic ideal)
- Ikki Kita
- Ilkka Niiniluoto
- Illative
- Illegalism
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- Illocutionary act
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- Illtyd Trethowan
- Illuminati
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- Illuminationism
- Illuminationist philosophy
- Illusion
- Illusion of asymmetric insight
- Illusion of control
- Illusion of transparency
- Illusionism (philosophy)
- Illusions
- Illusory correlation
- Illustrius Pusaeus
- Image
- Imagery
- Imaginary
- Imaginary Conversations
- Imagination
- Imaging
- Immaculate perception
- Immanence
- Immanent critique
- Immanent evaluation
- Immanuel Ben Solomon of Rome
- Immanuel Hermann Fichte
- Immanuel Kant
- Immanuel the Roman
- Immaterial
- Immaterial force
- Immaterialism
- Immediacy (philosophy)
- Immediate inference
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- Immigration Act of 1917
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- Immunology
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- Imre Lakatos
- In a Different Voice
- In Defense of Anarchism
- In Praise of Shadows
- In Search of Lost Time
- In Search of the Miraculous
- In vitro fertilisation
- Incarnation and Christology
- Incarnational humanism
- Inclusion (logic)
- Inclusive Democracy
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- Incoherence
- Incompatibilism
- Incompatible-properties argument
- Incomplete comparison
- Incompleteness
- Incompleteness theorem
- Incompleteness theorems
- Inconnu Independent Art Group
- Inconsistent triad
- Incontinence (philosophy)
- Incorporeality
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- Indefinite monism
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- Independence-friendly logic
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- Indeterminacy (philosophy)
- Indeterminacy debate in legal theory
- Indeterminacy of translation
- Indeterminacy principle
- Indeterminacy problem
- Indeterminate
- Indeterminism
- Index of aesthetics articles
- Index of ancient philosophy articles
- Index of epistemology articles
- Index of ethics articles
- Index of logic articles
- Index of metaphysics articles
- Index of philosophers
- Index of philosophy
- Index of philosophy articles
- Index of philosophy articles (A–C)
- Index of philosophy articles (D–H)
- Index of philosophy articles (R–Z)
- Index of philosophy of mind articles
- Index of social and political philosophy articles
- Indexed language
- Indexical
- Indexicality
- Indexicals
- Indian philosophy
- Indian political philosophy
- Indicative conditional
- Indicative conditionals
- Indicator
- Indifference
- Indifferent act
- Indigenism
- Indirect proof
- Indirect self-reference
- Indiscernibility
- Individual
- Individual reclamation
- Individualism
- Individualism and Economic Order
- Individualist anarchism
- Individualist ethical subjectivism
- Individuation
- Indo-European copula
- Indoctrination
- Indonesian philosophy
- Indra Sen
- Indriya
- Inductionism
- Inductive definition
- Inductive inference
- Inductive reasoning
- Inductivism
- Industrial espionage
- Industrialisation
- Ineffability
- Ineffective assistance of counsel
- Inequality
- Inequality Reexamined
- Infallibilism
- Infallibility
- Inference
- Inference rule
- Inference to the best explanation
- Inferential role semantics
- Infinitary logic
- Infinitary logics
- Infinite
- Infinite divisibility
- Infinite qualitative distinction
- Infinite regress
- Infinitesimals
- Infinitism
- Infinity
- Infinity (philosophy)
- Influence and reception of Friedrich Nietzsche
- Informal fallacy
- Informal logic
- Informal mathematics
- Information bias (psychology)
- Information ethics
- Information theory
- Informed consent
- Informed refusal
- Infoshop
- Infoshop.org
- Ingeborg Bachmann
- Ingeborg i Mjärhult
- Ingo Zechner
- Ingroup bias
- Ingsoc
- Inherence
- Inherence relation
- Inherent
- Inherent value
- Inherently funny word
- Iniciales
- Inka
- Innate idea
- Innate ideas
- Innate knowledge
- Innatism
- Inne pieśni
- Inner peace
- Innocence
- Inocenc Arnošt Bláha
- Inoue Tetsujirō
- Inquiry
- Inside Front
- Insight
- Insolubilia
- Instantiation
- Instantiation principle
- Institute for Anarchist Studies
- Institute for Ethics and Emerging Technologies
- Institute for the Secularisation of Islamic Society
- Institute of Pacific Relations
- Institution
- Institutional Critique
- Institutional cruelty
- Institutional theory of art
- Institutionalism
- Instrumental conditioning
- Instrumental rationality
- Instrumental value
- Instrumentalism
- Insufficient reason
- Insurrectionary anarchism
- Integral theory (Ken Wilber)
- Integral humanism (India)
- Integral humanism (Maritain)
- Integrative level
- Integrity
- Intellectual
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- Intelligence (trait)
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- Intelligible form
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- Intension
- Intensional definition
- Intensional logic
- Intensional statement
- Intensionality
- Intensive Science and Virtual Philosophy
- Intention
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- Intentional Logic
- Intentional object
- Intentional stance
- Intentionality
- Interactionism
- Interactionism (philosophy of mind)
- Interculturalism
- Interdependence
- Interests
- Intergenerational equity
- Intergenerational justice
- Interior algebra
- Internal discourse
- Internal realism
- Internalism
- Internalism and externalism
- Internalization
- International Academy of Humanism
- International Anarchist Congress of Amsterdam
- International Association for Computing and Philosophy
- International Association for Philosophy of Law and Social Philosophy
- International Commission of Jurists
- International Conference of Rome for the Social Defense Against Anarchists
- International Federation of Philosophical Societies
- International Journal of Baudrillard Studies
- International Journal of Žižek Studies
- International law
- International League of Humanists
- International Network of Engineers and Scientists for Global Responsibility
- International of Anarchist Federations
- International Philosophical Quarterly
- International Philosophy Day
- International Philosophy Olympiad
- International relations
- International Society for Philosophy of Music Education
- Internet Encyclopedia of Philosophy
- Internet ethics
- Internet research ethics
- Interoception
- Interpellation
- Interpretability
- Interpretability logic
- Interpretant
- Interpretation (aesthetics)
- Interpretation (logic)
- Interpretation of quantum mechanics
- Interpretive system
- Interpretivism (legal)
- Interregnum
- Intersection
- Intersubjective
- Intersubjective verifiability
- Intersubjectivity
- Intertheoretic reduction
- Interval scale
- Intervening variable
- Intisar-ul-Haque
- Intrinsic and extrinsic properties
- Intrinsic and extrinsic properties (philosophy)
- Intrinsic finality
- Intrinsic good
- Intrinsic properties
- Intrinsic property
- Intrinsic value
- Intrinsic value (animal ethics)
- Intrinsic value (ethics)
- Introduction to Arithmetic
- Introduction to Kant's Anthropology
- Introduction to Mathematical Philosophy
- Introduction to Metaphysics
- Introduction to Objectivist Epistemology
- Introjection
- Introspection
- Introspection illusion
- Intuition (Bergson)
- Intuition (knowledge)
- Intuition (philosophy)
- Intuition pump
- Intuitionism
- Intuitionism in ethics
- Intuitionist logic
- Intuitionistic logic
- Inverse (logic)
- Inverse gambler's fallacy
- Inversion
- Inverted qualia
- Inverted spectrum
- Invincible error
- Invincible ignorance fallacy
- Inviolability
- Invisible dictatorship
- Invisible hand
- Invisible Pink Unicorn
- Involuntary commitment
- Involuntary euthanasia
- Involuntary memory
- Involuntary treatment
- Involution (esoterism)
- Involution (philosophy)
- Ioan Zalomit
- Ioane Petritsi
- Ioanna Kucuradi
- Ion (dialogue)
- Ion Heliade Rădulescu
- Ion of Chios
- Ion Petrovici
- Ionian Enlightenment
- Ionian School (philosophy)
- Iosipos Moisiodax
- Ippen
- Ipso facto
- Ipso jure
- Iranian philosophy
- Irenaean theodicy
- Irenicism
- Iris Marion Young
- Iris Murdoch
- Ironism
- Irony
- Irrational Man: A Study in Existential Philosophy
- Irrationalism
- Irrationalism and aestheticism
- Irrationality
- Irrealism (philosophy)
- Irrealism (the arts)
- Irreducibility
- Irreflexive
- Irrelevant conclusion
- Irreligion
- Irresistible force paradox
- Irreversibility
- Irving Copi
- Irving Singer
- Irving Thalberg Jr.
- Irwin Edman
- Is-ought distinction
- Is-ought problem
- Is–ought problem
- Is and ought
- Is God Dead?
- Is Logic Empirical?
- Is ought problem
- Is the glass half empty or half full?
- Isaac Abrabanel
- Isaac Abravanel
- Isaac Beeckman
- Isaac ben Joseph ibn Pulgar
- Isaac ben Moses Arama
- Isaac de Pinto
- Isaac Israeli
- Isaac Israeli ben Solomon
- Isaac La Peyrère
- Isaac Levi
- Isaac Newton
- Isaac of Stella
- Isaac of Troki
- Isaac Passy
- Isaac Puente
- Isaak Benrubi
- Isaak Iselin
- Isabel Paterson
- Isabelle Stengers
- Isagoge
- Isaiah Berlin
- Isidore of Alexandria
- Islam and democracy
- Islamic capitalism
- Islamic ethics
- Islamic fundamentalism
- Islamic fundamentalism in Iran
- Islamic metaphysics
- Islamic Modernism
- Islamic philosophy
- Islamic theology
- Islamization of knowledge
- Ismail al-Faruqi
- Isocrates
- Isomorphism
- Isonomia
- Isotta Nogarola
- Issac La Peyrere
- Issac La Peyrère
- Issues in anarchism
- Isvarakrsna
- Italian Fascism
- Italian philosophy
- Iterative hierarchy
- Ito Jinsai
- Itō Jinsai
- Itsuo Tsuda
- Ivan Aguéli
- Ivan Aleksandrovich Il'in
- Ivan Chtcheglov
- Ivan Ilyin
- Ivan Kireyevsky
- Ivan Orlov (philosopher)
- Ivan Sviták
- Ivan Vyshenskyi
- Ivar Matlaus
- Ivar Mortensson-Egnund
- Ivo Urbančič
- Iyyun
J
- J. B. Schneewind
- J. Baird Callicott
- J. Barkley Rosser
- J. David Velleman
- J. J. C. Smart
- J. L. Ackrill
- J. L. Austin
- J. L. Mackie
- J. M. E. McTaggart
- J. M. Hinton (philosopher)
- J. O. Urmson
- J. P. Moreland
- J. P. Stern
- J. Paul Reddam
- J. W. R. Dedekind
- J. B. Schneewind
- J. D. Trout
- J. J. C. Smart
- J. W. R. Dedekind
- Ja'far Kashfi
- Jaakko Hintikka
- Jaan Kaplinski
- Jaap Kruithof
- Jacek Salij
- Jack Copeland
- Jack Meiland
- Jack of Diamonds (artists)
- Jack Russell Weinstein
- Jack Smart
- Jack White (trade unionist)
- Jacksonian democracy
- Jacob Acontius
- Jacob ben Nissim
- Jacob Burckhardt
- Jacob Freudenthal
- Jacob Friedrich Fries
- Jacob Friedrich von Abel
- Jacob Golomb
- Jacob Gould Schurman
- Jacob Klapwijk
- Jacob Klein (philosopher)
- Jacob Lorhard
- Jacob Needleman
- Jacobus Arminius
- Jacobus Naveros
- Jacopo Mazzoni
- Jacopo Zabarella
- Jacques-André Naigeon
- Jacques Barzun
- Jacques Bidet
- Jacques Bouveresse
- Jacques Chevalier
- Jacques Derrida
- Jacques Derrida bibliography
- Jacques Ellul
- Jacques Herbrand
- Jacques Lacan
- Jacques Maritain
- Jacques Rancière
- Jacques Rohault
- Jad Hatem
- Jaegwon Kim
- Jaime Balmes
- Jaime Giménez Arbe
- Jaimini
- Jain cosmology
- Jain philosophy
- Jaina philosophy
- Jainism
- Jakob Böhme
- Jakob Friedrich Fries
- Jakob Frohschammer
- Jakob Guttmann (rabbi)
- Jakob Klatzkin
- Jakob Lorber
- Jakob Sigismund Beck
- Jakob Thomasius
- Jakub Górski
- Jakub of Gostynin
- Jamasp
- James-Lange theory
- James-Lange theory of the emotions
- James Allen Graff
- James Beattie (writer)
- James Bissett Pratt
- James Brusseau
- James Bryce, 1st Viscount Bryce
- James Burnett, Lord Monboddo
- James Childress
- James Clerk Maxwell
- James Creed Meredith
- James DiGiovanna
- James Dunbar (writer)
- James E. Faulconer
- James Earl Baumgartner
- James Edwin Creighton
- James F. Conant
- James Ferrier
- James Franklin (philosopher)
- James Frederick Ferrier
- James G. Lennox
- James Griffin (philosopher)
- James Guillaume
- James Gustafson
- James Hall (philosopher)
- James Harrington
- James Harrington (author)
- James Hayden Tufts
- James Heisig
- James Hutchison Stirling
- James Hutton
- James L. Walker
- James M. Edie
- James MacKaye
- James Main Dixon
- James Mark Baldwin
- James Martin (philosopher)
- James Martineau
- James Mathias Fennelly
- James McCosh
- James Mill
- James of Viterbo
- James Otteson
- Jim Flynn
- James R. Griesemer
- James Rachels
- James Robb (philosopher)
- James Robert Brown
- James Tully (philosopher)
- James Ward (psychologist)
- Jamgon Ju Mipham Gyatso
- Jamie Whyte
- Jamil Sidqi al-Zahawi
- Jan Amos Komensky
- Jan Amos Komenský
- Jan Deutsch
- Jan Hus
- Jan Lukasiewicz
- Jan Łukasiewicz
- Jan Mukařovský
- Jan Narveson
- Jan of Stobnica
- Jan Patocka
- Jan Patočka
- Jan Pinborg
- Jan Sniadecki
- Jan Śniadecki
- Jan Sokol (philosopher)
- Jan Szylling
- Jan Wacław Machajski
- Jan Westerhoff
- Jan Woleński
- Jan Zwicky
- Jane Jacobs
- Janet Biehl
- Janet Coleman
- Janet McCracken
- Janet Radcliffe Richards
- Janko Prunk
- János Kis
- Jansenism
- Janus: A Summing Up
- Japanese aesthetics
- Japanese Anarchist Federation
- Japanese philosophy
- Japanese sound symbolism
- Jaroslav Peregrin
- Jason McQuinn
- Jason of Nysa
- Jason Stanley
- Jason Walter Brown
- Jaundice
- Javad Tabatabaei
- Javelin argument
- Javid Nama
- Jawaharlal Nehru
- Jay Newman
- Jay Rosenberg
- Jayanta Bhatta
- Jayarāśi Bhaṭṭa
- Jayatirtha
- Je Tsongkhapa
- Jealousy
- Jean-Baptiste Lamarck
- Jean-Francois Lyotard
- Jean-François Lyotard
- Jean-François Mattéi
- Jean-François Revel
- Jean-François Senault
- Jean-Gaspard Felix Lacher Ravaisson-Mollien
- Jean-Gaspard Félix Lacher Ravaisson-Mollien
- Jean-Jacques Pelletier
- Jean-Jacques Rousseau
- Jean-Louis Calandrini
- Jean-Louis de Lolme
- Jean-Louis Le Moigne
- Jean-Luc Marion
- Jean-Luc Nancy
- Jean-Marc Ferry
- Jean-Marie Guyau
- Jean-Michel Berthelot
- Jean-Paul Audet
- Jean-Paul Sartre
- Jean-Pierre de Crousaz
- Jean-Pierre Faye
- Jean-Pierre Voyer
- Jean-Yves Béziau
- Jean-Yves Girard
- Jean Anthelme Brillat-Savarin
- Jean Baudrillard
- Jean Beaufret
- Jean Bethke Elshtain
- Jean Biès
- Jean Bodin
- Jean Borella
- Jean Bourdeau
- Jean Buridan
- Jean C. Baudet
- Jean Capréolus
- Jean Cavaillès
- Jean Clam
- Jean Curthoys
- Jean de Gerson
- Jean de Silhon
- Jean Elizabeth Hampton
- Jean François de Saint-Lambert
- Jean Gerson
- Jean Grenier
- Jean Guitton
- Jean Hyppolite
- Jean le Rond d'Alembert
- Jean Le Rond d'Alembert
- Jean Leclerc (theologian)
- Jean Meslier
- Jean Nicod
- Jean Nicod Prize
- Jean Philibert Damiron
- Jean Piaget
- Jean Reynaud
- Jean Van Heijenoort
- Jean Wahl
- Jeanne Hersch
- Jedaiah ben Abraham Bedersi
- Jeff Malpas
- Jeff McMahan (philosopher)
- Jeff Monson
- Jeff Paris
- Jeffersonian democracy
- Jeffersonian political philosophy
- Jeffrey Nielsen
- Jen
- Jena romantics
- Jennifer Hornsby
- Jenny Teichman
- Jens Kraft
- Jens Staubrand
- Jeong Do-jeon
- Jeong Yak-yong
- Jeremy Bentham
- Jeremy Butterfield
- Jeremy Waldron
- Jeremy Weate
- Jeroen Groenendijk
- Jerome Frank
- Jerome Frank (lawyer)
- Jerome Ravetz
- Jerrold Katz
- Jerrold Levinson
- Jerry A. Fodor
- Jerry Alan Fodor
- Jerry Farber
- Jerry Fodor
- Jerry Fodor on mental architecture
- Jerry Fodor on mental states
- Jerusalem (Mendelssohn)
- Jerzy Giedymin
- Jerzy Łoś
- Jerzy Perzanowski
- Jerzy Prokopiuk
- Jesaiah Ben-Aharon
- Jesse Mann
- Jesse Prinz
- Jesús Mosterín
- Jesús Padilla Gálvez
- Jewish Bolshevism
- Jewish Communist Labour Party (Poalei Zion)
- Jewish Communist Party (Poalei Zion)
- Jewish Communist Union (Poalei Zion)
- Jewish ethics
- Jewish existentialism
- Jewish Kalam
- Jewish medical ethics
- Jewish philosophy
- Jhana
- Jhāna
- Jia Yi
- Jiao Yu
- Jiddu Krishnamurti
- Jien
- Jim Bell
- Jim Herrick
- Jin Yuelin
- Jindřich Zelený
- Jing Fang
- Jinul
- Jiva Goswami
- Jiyuan Yu
- Jizang
- Jo-ha-kyū
- Joachim Jungius
- Joachim of Fiore
- Joachim of Floris
- Joan Montseny
- Joan Peiró
- Joaquim Carreras I Artau
- Joaquín Ascaso Budria
- Joaquín Maurín
- Joaquín Trincado Mateo
- Jocelin of Soissons
- Jody Azzouni
- Joe Friggieri
- Joel Feinberg
- Joel J. Kupperman
- Joest Lips
- Johan Jakob Borelius
- Johan Robeck
- Johan van Benthem (logician)
- Johan Vilhelm Snellman
- Johann Adam Bergk
- Johann Augustus Eberhard
- Johann Christian Friedrich Holderlin
- Johann Christian Friedrich Hölderlin
- Johann Christian Lossius
- Johann Christoph Friedrich Schiller
- Johann Christoph Friedrich von Schiller
- Johann Christoph Wagenseil
- Johann Eduard Erdmann
- Johann Friedrich Flatt
- Johann Friedrich Herbart
- Johann Georg Hamann
- Johann Georg Heinrich Feder
- Johann Georg Sulzer
- Johann Gottfried Herder
- Johann Gottfried von Herder
- Johann Gottlieb Buhle
- Johann Gottlieb Fichte
- Johann Hast
- Johann Heinrich Abicht
- Johann Heinrich Bisterfeld
- Johann Heinrich Lambert
- Johann Heinrich Loewe
- Johann Heinrich Pabst
- Johann Heinrich Samuel Formey
- Johann Jakob Engel
- Johann Joachim Lange
- Johann Joachim Spalding
- Johann Karl Friedrich Rosenkranz
- Johann Nepomuk Ehrlich
- Johann Nepomuk Oischinger
- Johann Philipp Siebenkees
- Johann Sturm
- Johann Ulrich von Cramer
- Johann Wolfgang von Goethe
- Johannes Agnoli
- Johannes Bredenburg
- Johannes Clauberg
- Johannes de Muris
- Johannes de Raey
- Johannes Jacobus Poortman
- Johannes Kepler
- Johannes Nikolaus Tetens
- Johannes Philoponus
- Johannes Phocylides Holwarda
- Johannes Rehmke
- Johannes Scotus Eriugena
- Johannes Tauler
- John A. Leslie
- John Abercrombie (physician)
- John Alexander Gunn
- John Alexander Smith
- John Amos Comenius
- John Anderson (philosopher)
- John Argyropoulos
- John Armstrong (British writer/philosopher)
- John Arthur Passmore
- John Austin (legal philosopher)
- John B. Watson
- John Balguy
- John Beatty (philosopher)
- John Beverley Robinson (anarchist)
- John Blund
- John Broadus Watson
- John Broome (philosopher)
- John Bulwer
- John Burnheim
- John Callender (psychiatrist)
- John Calvin
- John Campbell (philosopher)
- John Caputo
- John Carew Eccles
- John Case (Aristotelian writer)
- John Clarke (Dean of Salisbury)
- John Cook Wilson
- John Corcoran (logician)
- John Corvino
- John Cowper Powys
- John Creaghe
- John Damascene
- John Daniel Wild
- John de Sècheville
- John Dee
- John Deely
- John Dewey
- John Dewey Society
- John Dumbleton
- John Duns Scotus
- John Dupré
- John E. Hare
- John E. Thomas
- John Earman
- John Elof Boodin
- John Etchemendy
- John F. X. Knasas
- John Finnis
- John Fiske (philosopher)
- John Fitzgerald (poet)
- John Foster (philosopher)
- John Gay
- John Greco (philosopher)
- John Grote
- John Halgren of Abbeville
- John Haugeland
- John Hawthorne
- John Hennon
- John Henry Bernard
- John Henry Mackay
- John Henry Morgan
- John Henry Muirhead
- John Henry Newman
- John Herman Randall Jr.
- John Heydon (astrologer)
- John Hick
- John Hoppus
- John Hospers
- John Italus
- John Jamieson Carswell Smart
- John Joseph Haldane
- John Kekes
- John L. Pollock
- John Lachs
- John Laird (philosopher)
- John Lemmon
- John Lennox
- John Levy (philosopher)
- John Lewis (philosopher)
- John Locke
- John Locke Lectures
- John Lucas
- John Lucas (philosopher)
- John M. Dillon
- John Macmurray
- John Macquarrie
- John Maeda
- John Major (philosopher)
- John Major
- John Martin Fischer
- John Maynard Keynes
- John Mbiti
- John McDowell
- John McMurtry
- John McTaggart Ellis McTaggart
- John Millar (philosopher)
- John Milton
- John Moore (anarchist)
- John N. Deck
- John N. Gray
- John Neihardt
- John Niemeyer Findlay
- John Norris (philosopher)
- John of Damascus
- John of Fidanza
- John of Głogów
- John of Jandun
- John of La Rochelle
- John of Mirecourt
- John of Paris
- John of Saint Thomas
- John of Salisbury
- John of St Thomas
- John of St. Thomas
- John Oswald (activist)
- John P. Anton
- John P. Burgess
- John Pagus
- John Passmore
- John Pecham
- John Peckham
- John Perry (philosopher)
- John Philoponus
- John Poinsot
- John Ponce
- John R. Searle
- John R. Steel
- John Rajchman
- John Ralston Saul
- John Raven
- John Rawls
- John Ray
- John Robert Jones
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M
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- Major term
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- Mandala
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- Mateu Morral
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- Matteotti Battalion
- Matter
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- Matthew Ferchi
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- Maya (illusion)
- Maya Keyes
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- Meaning
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- Meaning postulate
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- Mechanics (Aristotle)
- Mechanism (philosophy)
- Media accountability
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- Medical error
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- Medieval logic
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- Meditations
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- Meera Nanda
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- Meiklejohnian absolutism
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- Meme
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- Mendelian genetics
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- Mentality
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- Metal Gear Solid 3: Snake Eater
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- Metarealism
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- Meteorology (Aristotle)
- Method of agreement
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- Methodic doubt
- Methodical culturalism
- Methodios Anthrakites
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- Methodological individualism
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- Methodology
- Methods of obtaining knowledge
- Metrocles
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- Metrodorus of Stratonicea
- Mexican Liberal Party
- Michael A. E. Dummett
- Michael A. Smith (philosopher)
- Michael Anthony Eardley Dummett
- Michael Bratman
- Michael Davis (philosopher)
- Michael Devitt
- Michael Dummett
- Michael E. Rosen
- Michael E. Zimmerman (philosopher)
- Michael Ferejohn
- Michael Foster (philosopher)
- Michael Fourman
- Michael Frede
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- Michael Gelven
- Michael Gottlieb Birckner
- Michael Hardt
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- Michael Joseph Oakeshott
- Michael Levin (philosopher)
- Michael Lockwood (philosopher)
- Michael Lynch (philosopher)
- Michael Martin (philosopher)
- Michael Matteson
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- Michael Novak
- Michael O. Rabin
- Michael Oakeshott
- Michael of Ephesus
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- Michael Otsuka
- Michael Polanyi
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- Michael R. Ayers
- Michael Ruse
- Michael Sandel
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- Michael Scriven
- Michael Sprinker
- Michael Talbot (author)
- Michael Tye (philosopher)
- Michael Vavrus
- Michael Walzer
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- Michał Falkener
- Michał Heller
- Michał Sędziwój
- Michał Twaróg of Bystrzyków
- Michał Wiszniewski
- Michel Bitbol
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- Michel Henry
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- Microcosm
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- Might Is Right
- Might makes right
- Miguel de Unamuno
- Miguel de Unamuno y Jugo
- Miguel García (anarchist)
- Miguel García Vivancos
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- Miki Kiyoshi
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- Mikyö Dorje
- Milan Damnjanović (philosopher)
- Milan Kangrga
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- Mind & Language
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- Mind children
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- Mindset
- Mindstream
- Ming Dynasty
- Mingei
- Minima Moralia
- Minimal decency
- Minimalism
- Minimax
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- Minimum Intelligent Signal Test
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- Minkowski space-time
- Minor premise
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- Minority (philosophy)
- Minors and abortion
- Minos (dialogue)
- Mir Damad
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- Miracle
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- Miran Božovič
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- Mirosław Dzielski
- Mirror stage
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- Misanthropy
- Misinformation effect
- Miskawayh
- Misleading vividness
- Misology
- Misopogon
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- Mitchell Miller (philosopher)
- Mitchell Thomashow
- Miura Baien
- Miyabi
- Mladen Dolar
- Mnason of Phocis
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- Mo Ti
- Mo Tzu
- Mochus
- Modal fictionalism
- Modal logic
- Modal operator
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- Modal realism
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- Modality
- Mode of production
- Model (abstract)
- Model theory
- Models of scientific inquiry
- Moderate objectivism
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- Moderatus of Gades
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- Modern Moral Philosophy
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- Modern Physics and Ancient Faith
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- Modistae
- Modjtaba Sadria
- Modor
- Modular constructivism
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- Modus ponendo tollens
- Modus ponens
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- Modus tollens
- Mohamed Osman Elkhosht
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- Mohammed Sabila
- Mohandas Karamchand Gandhi
- Mohism
- Mohist philosophy
- Mohist School
- Moishe Tokar
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- Moksa (Jainism)
- Moksha
- Molecular biology
- Molinism
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- Molyneux problem
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- Monad
- Monad (Greek philosophy)
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- Monimus
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- Monroe Beardsley
- Montague grammar
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- Monte Carlo fallacy
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- Monty Hall problem
- Mood (psychology)
- Moore's paradox
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- Moral
- Moral absolutism
- Moral agency
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- Moral non-naturalism
- Moral objectivism
- Moral obligation
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- Moral perception
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- Moral relativism
- Moral responsibility
- Moral scepticism
- Moral sense
- Moral sense theory
- Moral skepticism
- Moral status of animals in the ancient world
- Moral subjectivism
- Moral syncretism
- Moral treatment
- Moral universalism
- Moralism
- Moralistic fallacy
- Morality
- Morality play
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- Moralium dogma philosophorum
- Morals
- Morals by Agreement
- Moravec's paradox
- Mordecai Kaplan
- Mores
- Moritz Carrière
- Moritz Geiger
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- Morphological freedom
- Morris Weitz
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- Mos maiorum
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- Mostafa Malekian
- Motion (physics)
- Motivation
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- Motoori Norinaga
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- Mozi
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- Muirhead Library of Philosophy
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- Mujo
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- Multi-criteria decision analysis
- Multi-valued logic
- Multicultural particularism
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- Multiperspectivalism
- Multiple-conclusion logic
- Multiple discovery
- Multiple Drafts Model
- Multiple realizability
- Multiple time dimensions
- Multiplicity (philosophy)
- Multitude
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- Mumbo Jumbo (phrase)
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- Murray Bookchin
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- Musa al-Sadr
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- Music
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- Musonius Rufus
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- Mutatis mutandis
- Mutual aid (organization theory)
- Mutual Aid: A Factor of Evolution
- Mutual liberty
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- Mutually exclusive events
- My Philosophical Development
- Myia
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- Myōe
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- Mystical realism
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- Mysticism
- Myth of Er
- Myth of Progress
- Myth of the given
- Mythologies (book)
- Mythos (Aristotle)
N
- N-tuple
- Nabat
- Nachman Krochmal
- Nader El-Bizri
- Nae Ionescu
- Nagarjuna
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- Nahmanides
- Naïve empiricism
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- Najmuddin Kubra
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- Namarupa
- Name
- Name calling
- Names
- Naming and Necessity
- Namus
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- Narayana Guru
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- Naropa
- Narrative
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- Nassim Nicholas Taleb
- Nasty, brutish, and short
- Nate Ackerman
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- Nation
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- Natural (disambiguation)
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- Natural deduction
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- Natural philosophy
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- Natural Supernaturalism
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- Naturales quaestiones
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- Naturalism (philosophy)
- Naturalistic fallacy
- Naturalistic pantheism
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- Nature
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- Nature of God
- Nature versus nurture
- Naturphilosophie
- Naturwissenschaften
- Nausea (novel)
- Nausiphanes
- Navya-Nyāya
- Necessary and sufficient condition
- Necessary and sufficient conditions
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- Ned Block
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- Neetham
- NEFAC
- Negarchy
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- Neglect of probability
- Negotiation
- Negritude
- Neil Gillman
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- Neither Victims Nor Executioners
- Nel Noddings
- Neleus of Scepsis
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- Nemesius
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- Neo-Aristotelianism (philosophy)
- Neo-conceptual art
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- Neocolonial Dependence
- Neofunctionalism (sociology)
- Neomodern
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O
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P
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Q
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- Quotation
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