LIST OF PHILOSOPHICAL TOPICS (R-Z)

Contents

R

Ra

Re

Rea-Rei

Rel-Rev

Rh

Ri

Ro

Ru

Ry

S

Sa

Sc

Se

Sh

Si

Sk

Sl

Sm

Sn

So

Sp

Sq

Sr

St

Su

Sw

Sy

Sz

T

Ta

Te

Th

Ti

To

Tr

Ts

Tu

Tw

Ty

Tz

U

V

W

X

Y

Z

See also

R

Ra

Rabad
- Rabbinic law
- Rabbinic theology
- Francois Rabelais
- François Rabelais
- race
- racetrack paradox
- racism
- Gustav Radbruch
- Janet Radcliffe Richards
- Sarvepalli Radhakrishnan
- radical Aristotelianism
- radical behaviourism
- radical feminism
- radical interpretation
- radical philosophy
- radical translation
- radical translation and radical interpretation
- Qutb al-Din Ahmad al-Rahim
- Karl Rahner
- Ramakrishna movement
- Ramanuja
- Rāmānuja
- Pierre de la Ramee
- Pierre de la Ramée
- ramified type theory
- Ramist movement
- Allan Ramsay
- Frank P. Ramsey
- Frank Plumpton Ramsey
- Ian Thomas Ramsey
- Ramsey-eliminability
- Ramsey-Lewis method
- Ramsey sentence
- Ramsey test
- Petrus Ramus
- randomness
- range
- Hastings Rashdall
- ratio recta
- ratio scale
- ratiocination
- rational beliefs
- rational choice theory
- rational number
- rational psychology
- rational reconstruction
- rationalism
- rationality
- rationality and cultural relativism
- rationality of belief
- rationalization
- Felix Ravaisson
- Félix Ravaisson
- Jean-Gaspard Felix Lacher Ravaisson-Mollien
- Jean-Gaspard Félix Lacher Ravaisson-Mollien
- Raven paradox
- raw feels
- John Rawls
- John Ray
- al-Rāzī
- al-Razi
- Abu Bakr Muhammad Ibn Zakariyya' al-Razi
- Fakhr al-Din al-Razi

Re

Rea-Rei

reactive attitude
- reaction
- real
- real assent
- real definition
- real distinction
- real essence
- real mathematics
- real number
- real proposition
- realism
- realism and antirealism
- realism and anti-realism
- realism ante rem
- realism in rebus
- realism in the philosophy of mathematics
- reality
- reality enforcement
- reality principle
- realizability
- realization
- reason
- reason as slave of the passions
- reasoning
- reasons
- reasons and causes
- Reasons and Persons
- reasons externalism
- reasons for action
- reasons for belief
- reasons internalism
- rebirth
- Rechtsstaat
- reciprocal altruism
- reciprocity
- recognition
- recollection
- reconstruction
- rectification and remainders
- Rectification of Names
- recurrence
- recursion
- recursion-theoretic hierarchies
- recursive function
- recursive function theory
- redintegration
- redistribution
- reducibility
- reducibility of consciousness
- reduct
- reductio ad absurdum
- reductio ad impossibile
- reduction
- reduction base
- reduction sentence
- reductionism
- reductionism in the philosophy of mind
- reductive naturalism
- redundancy
- redundancy theory of truth
- redundant
- Paul Ree
- Paul Rée
- reference
- reference class
- referential
- referential occurrence
- referential opacity
- referential quantification
- referential theory of meaning
- referentially transparent
- referring
- reflection
- reflection principles
- reflective equilibrium
- reflexive
- reflexivity
- reform
- reformed epistemology
- regional supervenience
- Pierre-Sylvain Regis
- Pierre-Sylvain Régis
- regress
- regress argument
- regress argument in epistemology
- regression analysis
- regressor variable
- regularity theory of causation
- regulative principle
- regulative principles
- August Wilhelm Rehberg
- Wilhelm Reich
- Hans Reichenbach
- Thomas Reid
- reification (fallacy)
- Hermann Samuel Reimarus
- Adolf Reinach
- reincarnation
- Karl Leonhard Reinhold
- reism

Rel-Rev

relation
- relational
- relational logic
- relational quantum mechanics
- relational semantics
- relational value
- relationalism
- relationism
- relations
- relative identity
- relative threshold
- relative time
- relative value
- relativism
- relativity
- relativity of knowledge
- relativity theory
- relevance logic
- relevance logic and entailment
- relevance of logic
- relevant alternative
- reliabilism
- religion
- religion and epistemology
- religion and morality
- religion and political philosophy
- religion and science
- religion, art, and science
- religious belief
- religious belief and cosmology
- religious experience
- religious language
- religious pluralism
- Religiousness A and B
- remembering
- reminiscence
- Renaissance philosophy
- Karl Renner
- Charles Renouvier
- Charles Bernard Renouvier
- representation
- representation theorem
- representational
- representational scheme
- representational theory of art
- representational theory of memory
- representationalism
- representative realism
- repression
- reprobation
- reproduction and ethics
- republicanism
- rerum natura
- respect
- respect for persons
- responsibilities of scientists and intellectuals
- representation
- representation in art
- representative theory of perception
- res cogitans
- res extensa
- Nicholas Rescher
- resentment
- respondent conditioning
- response variable
- responsibility
- restricted quantification
- restrictio
- resultance
- resultant attribute
- resurrection
- retributive justice
- retributive justice
- retributivism
- retrocausation
- revaluation of values
- revealed truth
- revelation
- revenge
- revisionary metaphysics
- revolution

Rh

Rhazes - rhetoric - rhetoric of science

Ri

Ricardus Sophista
- Richard Kilvington
- Richard of Cornwall
- Richard of Middleton
- Richard of St Victor
- Richard Rufus
- Richard Rufus of Cornwall
- Richard the Sophister
- Richard's paradox
- Heinrich Rickert
- Paul Ricoeur
- Paul Ricœur
- G. F. B. Riemann
- right
- the right
- right action
- right and good
- right of nature
- rightness
- rights
- rigid designator
- rigorism
- rigorous duty
- ring of Gyges
- risk
- risk assessment
- risus sophisticus
- ritual

Ro

robot
- Jacques Rohault
- role obligations
- role of decoherence in quantum mechanics
- role responsibility
- Roman law
- Roman philosophy
- Judah Romano
- romantic irony
- romanticism
- Romanticism and conservatism
- Francisco Romero (philosopher)
- Richard Rorty
- Richard McKay Rorty
- Roscelin de Compiègne
- Roscelin de Compiegne
- Roscelin of Compiègne
- Roscelin of Compiegne
- Franz Rosenzweig
- Antonio Rosmini
- Antonio Rosmini-Serbati
- Rosminians
- Alf Ross
- W. D. Ross
- W.D. Ross
- William David Ross
- Jean-Jacques Rousseau
- Josiah Royce
- Vasilii Rozanov
- Vasilii Vasil'evich Rozanov

Ru

Musonius Rufus
- Richard Rufus
- Arnold Ruge
- rule
- rule consequentialism
- rule of addition
- rule of conjunction
- rule of detachment
- rule of double negation
- rule of inference
- rule of law
- rule of recognition
- rule of simplification
- rule of total evidence
- rule utilitarianism
- rules
- Ruling Argument
- Ibn Rushd
- Bertrand Russell
- Bertrand Arthur William Russell
- Russell's moral philosophy
- Russell's paradox
- Russian empiriocriticism
- Russian literary Formalism
- Russian materialism
- Russian nihilism
- Russian philosophy
- Russian Religious-Philosophical Renaissance

Ry

Gilbert Ryle
- Ryle's regress

S

S4
- S5

Sa

Sa skya Pandita
- Saadiah Gaon
- Saadiah Gaon al-Fayyumi
- al-Sabzawari
- al-Hajj Mulla Hadi al-Sabzawari
- Ammonius Saccas
- sacraments
- sacred
- sage
- Sagya Pandita
- Sagypandita
- Mark Sainsbury
- Saint Petersburg paradox
- Saint-Simon
- Claude-Henri de Rouvroy, comte de Saint-Simon
- Sakti
- Saktism
- Nathan Salmon
- Wesley Salmon
- salva veritate
- salvation
- samadhi
- sāmādhi
- samanantara-pratyaya
- samatha
- Samhita
- Samkara
- Śamkara
- Samkhya
- Sāmkhya
- samples
- samsara
- samsāra
- Francisco Sanches
- sactification
- sanction
- Michael Sandel
- Sankara
- Śankara
- Sankhya
- Sānkhya
- Sankhya-Yoga
- George Santayana
- Edward Sapir
- Sapir-Whorf hypothesis
- Jean-Paul Sartre
- sat, chit, ānanda
- satisfaction
- satisfaction conditions
- satisfiable
- satisfice
- satisficing
- saturated
- saturated expression
- Ferdinand de Saussure
- Friedrich Karl von Savigny
- saying and showing

Sc

scalar implicature
- Scandinavian philosophy
- scepticism
- scepticism about law
- scepticism about religion
- Sceptics
- Richard Schacht
- Schadenfreude
- Max Scheler
- Max Ferdinand Scheler
- Friedrich Wilhelm Joseph Schelling
- Friedrich Wilhelm Joseph von Schelling
- Schellingianism
- schema
- schemata
- schematic form
- scheme
- scheme of abbreviation
- Ferdinand Canning Scott Schiller
- Johann Christoph Friedrich Schiller
- Johann Christoph Friedrich von Schiller
- Friedrich Schlegel
- Friedrich von Schlegel
- Friedrich Schleiermacher
- Friedrich Daniel Schleiermacher
- Friedrich Daniel Ernst Schleiermacher
- Friedrich Albert Moritz Schlick
- Moritz Schlick
- Kaspar Schmidt
- Carl Schmitt
- Scholastic method
- Scholasticism
- School of Laws
- School of Names
- Arthur Schopenhauer
- Schröder-Bernstein theorem
- Erwin Schrödinger
- Schrödinger cat paradox
- Schrödinger equation
- Gottlob Ernst Schulze
- Joseph Alois Schumpeter
- Anna Maria van Schurman
- Alfred Schutz
- Alfred Schütz
- science
- science and gender
- science and knowledge
- science and life
- science and philosophy
- science and religion
- science, art, and religion
- science in Islamic philosophy
- scientia media
- scientia universalis
- scientific antirealism
- scientific behaviorism
- scientific determinism
- scientific explanation
- scientific instruments
- scientific knowledge
- scientific method
- scientific progress
- scientific realism
- scientific realism and antirealism
- scientific realism and social science
- scientific relativism
- scientific theories
- scientific theory
- scientific unity
- scientism
- scientists' belief in God
- scope
- scope ambiguity
- scope fallacies
- scope of operators
- Scotistic realism
- Scottigena
- Scottish common sense philosophy
- Scottish philosophy
- John Duns Scotus
- Johannes Scotus Eriugena
- script
- Roger Scruton

Se

sea battle
- John Searle
- John R. Searle
- second actualization
- second- and higher-order logics
- second imposition
- second intention
- second law of thermodynamics
- second-order
- second-order logic
- second potentiality
- second Thomism
- secondarily evaluative word
- secondary process
- secondary qualities
- secondary rule
- secondary substance
- secondness
- secundum quid
- security strategy
- seeing
- seeing as
- John Selden
- selection
- self
- self-consciousness
- self-control
- self-cultivation in Chinese philosophy
- self-deception
- self-determination
- self-evidence
- self-interest
- self-interest theory
- self-justification
- self-love
- self-organizing system
- self-presenting
- self-realization
- self-reference
- self-referential incoherence
- self-regarding and other-regarding actions
- self-reproducing automaton
- self-respect
- Roy Wood Sellars
- Wilfrid Sellars
- Wilfrid Stalker Sellars
- semantic ascent
- semantic atomism
- semantic challenges to realism
- semantic completeness
- semantic compositionaliry
- semantic conceptions of information
- semantic consequence
- semantic consistency
- semantic holism
- semantic molecularism
- semantic nihilism
- semantic paradoxes
- semantic paradoxes and theories of truth
- semantic solipsism
- semantic tableaux
- semantic theory of truth
- semantic truth
- semantics
- semi-order
- semiosis
- semiotic
- semiotics
- Amartya K. Sen
- Lucius Annaeus Seneca
- Seneca the Younger
- Seng-chao
- Sengzhao
- sensa
- sensation
- sensationalism
- sense
- sense and reference
- sense awareness
- sense-data
- sense-datum theory
- sense perception
- sense qualia
- sensibility
- sensible intuition
- sensibles
- sensorium
- sensum
- sensus communis
- sentence
- sentences
- sentential calculus
- sentential connective
- sentential function
- sentential operator
- sentiment
- sentimentalism
- sentiments
- separation
- separation of law and morals
- sequent calculus
- Serbian philosophy
- John Sergeant
- set
- set-theoretic paradoxes
- set-theoretic reflection principles
- set theory
- Heinrich Seuse
- seven emotions
- Seven Sages of Greece
- Seven Worthies of the Bamboo Grove
- sex
- sexism
- Sextus Empiricus
- sexual morality
- sexuality

Sh

Lord Shaftesbury
- Anthony Ashley Cooper, third Earl of Shaftesbury
- Shah Wali Allah
- shamanism
- shame
- shan
- shang ti
- Lord Shang
- Shang Yang
- Shankara
- Shao Yong
- Shao Yung
- Johannes Sharpe
- Sheffer stroke
- Shem Tov family
- shen
- Shen Pu-hai
- Shen Tao
- Shen Tzu
- sheng
- Mary Shepherd
- William Sherwood
- Lev Shestov
- shih
- Shinran
- Shinto
- Shintō
- ship of Theseus
- al-Shirazi
- Sadr al-Din Muhammad al-Shirazi
- Sydney Shoemaker
- Shotoku Constitution
- Shōtoku Constitution
- Gustav Gustavovich Shpet
- shriek
- shriek operator
- shu
- Yehuda Leib Shvartsman
- William Shyreswood

Si

Siddhartha Gautama
- Siddhārtha Gautama
- side constraints
- Henry Sidgwick
- Siger of Brabant
- Sign (semiotics)
- sign and symbol
- signified
- signifier
- Signposts movement
- signs
- al-Sijistani
- Abu Sulayman Muhammad al-Sijistani
- silhak
- Francesco Silvestri
- Silvestris Berardus
- similarity
- Georg Simmel
- Simon of Faversham
- simple ordering
- simple supposition
- simple theory of types
- simplicity
- Simplicius
- simplification
- Simpson's paradox
- simulated reality
- simulation theory
- simulator
- simultaneity
- sin
- Ibn Sina
- sincerity
- sine qua non
- Peter Singer
- Peter A. Singer
- single case
- singleton set
- singular causal relation
- singular causal statement
- singular term
- Sinn
- sinsign
- Sirhak
- Sittlichkeit
- situation ethics
- situation semantics
- situation theory
- situational semantics
- Siva
- six emotions

Sk

skeptic
- skepticism
- Skeptics
- B. F. Skinner
- Burrhus Frederick Skinner
- Thoralf Skolem
- Skolem-Löwenheim theorem
- Skolem normal form
- Skolem paradox
- Skolem's paradox
- Hryhorii Savych Skovoroda

Sl

slave morality
- slave of the passions
- slavery
- Slavophilism
- slime
- slippery slope
- slippery slope argument
- Slovene philosophy

Sm

J. J. C. Smart
- J.J.C. Smart
- Jack Smart
- John Jamieson Carswell Smart
- Adam Smith

Sn

snow is white

So

social action
- social biology
- social choice
- social constructionism
- social contract
- Social Darwinism
- social democracy
- social dimensions of knowledge
- social engineering
- social epistemology
- social ethics
- social facts
- social justice
- social laws
- social norms
- social philosophy
- social philosophy of science
- social relativism
- social science
- social theory and law
- socialism
- society
- Society of Mind theory
- Socinianism
- Faustus Socinus
- Laelus Socinus
- sociobiology
- socio-biology
- sociolect
- sociological jurisprudence
- sociology
- sociology of knowledge
- Socrates
- Socrates Scholasticus
- Socratic dialogues
- Socratic intellectualism
- Socratic irony
- Socratic method
- Socratic paradox
- Socratic paradoxes
- Socratic schools
- soft determinism
- software
- Shihab al-Din Yahya Sohravardi
- Shihāb al-Dīn Yahyā Sohravardī
- Sokal Affair
- solidarity
- solipsism
- Solomon Ibn Gabirol
- Joseph B. Soloveitchik
- Vladimir Solov'ëv
- Vladimir Sergeevich Solov'ëv
- Vladimir Solovyov
- Vladimir Sergeevich Solovyov
- Son Buddhism
- Song of God
- sophia
- sophism
- sophismata
- sophist
- Sophists
- Sophocles
- Richard Sorabji
- Richard Ruston Kharsedji Sorabji
- Georges Sorel
- sorites
- sorites paradox
- sortal
- sortal predicate
- Ernest Sosa
- Sosan Hyujong
- Sôsan Hyujông
- Domingo de Soto
- soul
- soul in Islamic philosophy
- soundness
- South American philosophy
- South Slavic philosophy
- sovereignty
- Soviet philosophy

Sp

space
- space and time
- space-time
- spacetime
- Spanish philosophy
- spatiotemporal continuity
- speaker's meaning
- special relativity
- special senses
- special sensibles
- species
- species problem
- speciesism
- specious present
- speckled hen
- spectrum inversion
- speculative philosophy
- speculative reason
- speech act theory
- speech acts
- speech-acts
- Herbert Spencer
- Speusippus
- Baruch Spinoza
- Benedict de Spinoza
- Benedictus Spinoza
- Afrikan Spir
- spirit
- spissitude
- split brain effects
- split brains
- spontaneity
- spontaneity and indifference
- sport
- sport and ethics
- spread law
- T. L. S. Sprigge
- T.L.S. Sprigge
- Timothy L. S. Sprigge

Sq

square of opposition

Sr

Sri Aurobindo

St

St. Petersburg paradox
- philosophy made in student's study skills
- Germaine, madame de Staël
- Anne-Louise-Germaine, madame de Staël-Holstein
- Stagirite
- James Dalrymple, Viscount Stair
- Robert Stalnaker
- Robert C. Stalnaker
- standard analysis
- standard interpretation
- standard model
- standard semantics
- state
- state description
- state function
- state of affairs
- state of nature
- state space
- state table
- state variable
- state verb
- statement
- statement form
- statements
- statements and sentences
- statistical explanation
- statistical independence
- statistical law
- statistical physics
- statistical probability
- statistics
- statistics and social science
- Rudolf Steiner
- Leslie Stephen
- Sir Leslie Stephen
- Charles L. Stevenson
- Charles Leslie Stevenson
- Dugald Stewart
- Stephen Stich
- Edward Stillingfeet
- stipulative definition
- Max Stirner
- stochastic process
- Stoicism
- stone paradox
- stories and explanation
- George Frederick Stout
- Strabo
- strategy
- Strato
- Strato of Lampascus
- Straton
- David Friedrich Strauss
- Leo Strauss
- straw man fallacy
- P. F. Strawson
- P.F. Strawson
- Peter Strawson
- Peter F. Strawson
- Peter Frederick Strawson
- stream of consciousness
- strict conditional
- strict duty
- strict identity
- strict implication
- strict partial order
- stroke notation
- strong semantic completeness
- strong soundness
- strong supervenience
- Barry Stroud
- study skills
- structural violence
- structuralism
- structuralism in linguistics
- structuralism in literary theory
- structuralism in social science
- structure
- structure description
- stuff
- Sturm und Drang

Su

Francisco Suárez
- Francisco Suarez
- sub specie aeternitatis
- subaltern
- subconscious mind
- subcontraries
- subcontrary
- subdoxastic
- subject (philosophy)
- subject and predicate
- subject-object dichotomy
- subjective probability
- subjective reason
- subjective rightness
- subjective truth
- subjectivism (see also metaphysical subjectivism)
- subjectivity
- subjunctive conditional
- sublation
- sublime
- subset
- subsidiarity
- subsistence
- substance
- substance and attribute
- substance causation
- substance-function
- substance theory
- substantial form
- substantialism
- substantival causation
- substantivalism
- substantive pluralism
- substitutability salva veritate
- substitutional quantification
- substitutivity salva veritate
- substrate
- substratum
- substructural logic
- subsumption theory of explanation
- Gabrielle Suchon
- suffering
- sufficient condition
- sufficient reason
- Sufism
- Shihab al-Din Yahya al-Suhrawardi
- sui generis
- suicide
- summum bonum
- summum genus
- Sun Bin
- Sun Pin
- Sun Tzu
- Sun Wu
- Sun Yat-sen
- Sung Hsing
- Sung Tzu
- sunyata
- śūnyatā
- Sunzi
- superaltern
- superego
- supererogation
- superman (disambiguation)
- supernatural
- supernatural theology
- supernaturalism
- superseding cause
- superset
- superstructure
- supertasks
- supervaluation
- supervaluation semantics
- supervenience
- supervenience of the mental
- supervenient behaviorism
- suppositio
- supposition theory
- sure-thing principle
- surface grammar
- surface structure
- surplus value
- survival
- Henry Suso
- sustaining cause
- sutra

Sw

Swami Vivekananda
- Emanuel Swedenborg
- Swedenborgianism
- Swedish philosophy
- Richard Swinburne

Sy

syllogism
- Francis Sylvester of Ferrara
- symbol
- symbolic interactionism
- symbolic logic
- symbols
- symmetric relation
- symmetrical
- symmetry
- symmetry thesis
- sympathy
- symptom
- synesthesia
- syncategoremata
- syncategorematic
- synderesis
- syndicalism
- synechism
- synergism
- synergy
- synonymous definition
- synonymy
- syntactic ambiguity
- syntactic consistency
- syntactic term
- syntactics
- syntax
- synthesis
- synthetic
- synthetic a priori
- synthetic a priori judgements
- synthetic knowledge
- synthetic proposition
- synthetic statements
- Syrian school
- Syrianus
- system
- systems analysis
- systems theory
- systems theory in social science

Sz

szu

T

T schema
- T sentence

Ta

Ta-hsueh
- Ta-hsüeh
- Ta Hsüeh
- table of categories
- table of judgments
- tabula rasa
- tacit consent
- tacit knowledge
- Rabindranath Tagore
- Tai Chen
- t'ai-chi
- Hippolyte-Adolphe Taine
- Hippolyte Taine
- taking children seriously
- T'an Ssu-t'ung
- Tanabe Hajime
- T'ang Chun-i
- T'ang Chün-i
- Tantra
- tao
- tao-hsin
- tao-hsin and jen-hsin
- Tao Te Ching
- tao-t'ung
- Taoism
- Taoist philosophy
- tar-water
- Tarot
- Alfred Tarski
- Tarskian biconditional
- Tarskian satisfaction
- Tarskian semantics
- Tarski's definition of truth
- Tarski's theorem
- Tarski's schema
- Tarski's T-schema
- Tasan
- task verb
- taste
- John Tauler
- tautology
- Abu Hayyan al-Tawhidi
- taxonomy
- Charles Taylor
- Harriet Taylor
- Richard Taylor

Te

te
- teaching and indoctrinating
- teaching philosophy
- techne
- technology
- technology and ethics
- Gustav Teichmuller
- Gustav Teichmüller
- Pierre Teilhard de Chardin
- Tel Quel School
- telekinesis
- teleofunctionalism
- teleological argument
- teleological argument for the existence of God
- teleological ethics
- teleological explanation
- teleological law
- teleological suspension of the ethical
- teleological theories of mental content
- teleology
- teleosemantics
- telepathy
- Bernardino Telesio
- telishment
- telos
- temperance
- template
- William Temple
- temporal becoming
- temporal logic
- temporal properties
- temporal relations
- tender-minded
- tender-minded and tough-minded
- Frederick Robert Tennant
- tense and temporal logic
- tense logic
- tensed identity
- Teresa of Ávila
- Teresa of Avila
- Saint Teresa of Ávila
- Saint Teresa of Avila
- term
- terminist logic
- terminus a quo
- terminus ad quem
- terrorism
- tertiary qualities
- tertium non datur
- Tertullian
- Quintus Septimus Florens Tertullian
- test of time
- testability
- testimony
- testimony in Indian philosophy
- Johann Nicolas Tetens
- Johann Nicolaus Tetens
- Tetractys

Th

Thales
- Thales of Miletus
- Theatetus
- theism
- thema
- Themistius
- theodicy
- Theodorus of Cyrene
- theologica naturalis
- theological creationism
- theological naturalism
- theological virtues
- theological voluntarism
- theology
- theology and philosophy
- theology of liberation
- Theophrastus
- theorem
- theoretical concept
- theoretical construct
- theoretical entity
- theoretical identity
- theoretical judgment
- theoretical rationality
- theoretical reason
- theoretical reasoning
- theoretical term
- theoretical underdeterimination
- theoretical virtues
- theoria
- theories
- theory
- theory and observation in the social sciences
- theory and practice
- theory-laden
- theory of appearing
- theory of conduct
- theory of descriptions
- theory of effluxes
- theory of everything (philosophy)
- Theory of Forms
- theory of frequency
- theory of ideas and vision in God
- theory of justification
- The Theory of Moral Sentiments
- theory of relativity
- theory of signs
- theory of types
- theory theory
- theosophy
- Theravada Buddhism
- thermodynamics
- thesis
- theurgy
- Helmut Thielicke
- Thierry of Chartres
- thing
- thing-in-itself
- thing in itself
- things
- thinking
- thinking causes
- third man argument
- Third Man argument
- thirdness
- thisness
- Thomas À Kempis
- Thomas Aquinas
- Christian Thomas
- Thomas of York
- Christian Thomasius
- Thomism
- Judith Jarvis Thomson
- Henry David Thoreau
- thought
- thought experiment
- thought experiments
- Thrasymachus
- Three Profound Treatises
- three-valued logic
- Three Ways
- threshold
- Thucydides

Ti

t'i
- ti and yong
- t'i and yung
- Tibetan Buddhism
- Tibetan philosophy
- tian
- t'ien
- t'ien-jen ho-i
- t'ien-li
- t'ien li and jen-yü
- t'ien ming
- Tillers
- Paul Tillich
- time
- time lag argument
- time preference
- time slice
- time travel
- time-travel
- Timon
- Timon of Philius
- Matthew Tindal
- William Tisberi

To

to be
- Alexis de Tocqueville
- Tzvetan Todorov
- T'oegye
- Toegye
- token
- token epiphenomenalism
- token physicalism
- token-reflexive
- token reflexive
- token-token identity
- token-type distinction
- John Toland
- Francisco Toledo
- tolerance
- toleration
- Francisco Toletus
- Franciscus Toletus
- Count Lev Nikolaevich Tolstoi
- Tominaga Nakamoto
- tone
- Tonghak
- tonk
- top-down
- top down
- topic-neutral
- topic neutral
- total
- total evidence
- total ordering
- totalitarianism
- tough-minded
- toxin puzzle
- Arnold Toynbee

Tr

tracking
- Tractarian
- Tractatus Logico-Philosophicus
- tradition
- traditionalism
- traducianism
- tragedy
- tragedy of the commons
- transcendence
- transcendental
- transcendental analytic
- transcendental argument
- transcendental arguments
- transcendental deduction
- transcendental dialectic
- transcendental ego
- transcendental idealism
- transcendental number
- transcendental subjectivity
- transcendental term
- transcendental terms
- transcendental unity of apperception
- transcendentalia
- transcendentalism
- transcendentals
- transeunt causation
- transferable utility
- transfinite induction
- transfinite number
- transformation rule
- transformational grammar
- transitive
- transitive closure
- transitive relation
- transitivity
- translation
- translators
- transparency
- transparent
- transparent context
- transposition
- transubstantiation
- transvaluation of values
- transversality
- traversal of the infinite
- tree of Porphyry
- Trial of Socrates
- trichotomous
- trichotomy
- Trinitarianism
- Trinity
- Tripitaka
- Ernst Troeltsch
- Ernst Peter Wilhelm Troeltsch
- trolley problem
- trope
- Leon Trotsky
- Catherine Trotter
- true for me
- trust
- truth
- truth and meaning
- truth-conditional semantics
- truth-conditional theory of meaning
- truth conditions
- truth-conditions
- truth definition
- truth-function
- truth-functions
- truth predicate
- truth table
- truth-table method
- truth theory
- truth-value
- truth-value gaps
- truth-value semantics
- truthfulness
- truthlikeness
- truthmaker principle
- trying

Ts

Ehrenfried Walther von Tschirnhaus
- Tsong kha pa Blo bzang grags pa
- Tsung-Mi

Tu

tu quoque
- Abraham Tucker
- Ernst Tugendhat
- Tung Chung-shu
- Alan Turing
- Alan Mathison Turing
- Turing degree
- Turing degrees
- Turing machine
- Turing machine functionalism
- Turing machines
- Turing reducibility
- Turing test
- George Turnbull
- Khwajah Nasir al-Tusi

Tw

Twardowski
- Kazimierz Twardowski
- twin earth
- Twin-Earth
- Twin Earth thought experiment
- Two Dogmas of Empiricism

Ty

tychism
- type
- type epiphenomenalism
- type materialism
- type physicalism
- type identity
- type-identity theory
- type theory
- type-token distinction
- type-type identity
- types

Tz

tzu jan

U

Pietro Ubaldi
- Ubermensch
- Übermensch
- Udana
- Udayana
- Uddyotakara
- ugliness
- Uisang
- Ûisang
- Ulrich of Strasbourg
- Hermann Ulrici
- Miguel de Unamuno
- Miguel de Unamuno y Jugo
- unary quantifier
- uncertainty
- uncertainty principle
- unconscious
- unconscious and subconscious mind
- unconscious mental states
- unconscious mind
- unconsciousness
- uncountable
- undecidability
- undecidable
- undefeated
- undemonstrable argument
- underdetermination
- underdetermination thesis
- understanding
- underworld of philosophy
- undistributed middle
- unexpected examination paradox
- Peter Unger
- unhappy consciousness
- unified science
- uniformity of nature
- union
- union theory
- unisyncretism
- unitarianism
-
- unity in diversity
- unity of science
- unity of the proposition
- universal (metaphysics)
- universality (philosophy)
- universal characteristic
- universal constructor
- universal disposition
- universal generalization
- universal grammar
- universal instantiation
- universal language
- universal proposition
- universal quantification
- universal quantifier
- universal relation
- universal simulator
- universalism
- universalism in ethics
- universality
- universalizability
- universals
- universe
- universe of discourse
- unknowable
- unlikely philosophical propositions
- unmoved mover
- unsaturated
- unsaturated expression
- unsolvability
- Upanishads
- use–mention distinction
- use theory of meaning
- utilitarianism
- utility
- utility function
- utopia
- utopianism
- Uttara Mimamsa
- Uttara Mīmamsā
- utterance
- utterer
- utterer's meaning
- Dimitri Uznadze

V

vacuous
- vacuous truth
- vague objects
- vagueness
- Hans Vaihinger
- Guillaume du Vair
- Vaisesika
- Vaiśesika
- Valentinianism
- Valentinius
- Valentinus
- valid
- validity
- Lorenzo Valla
- Vallabhacharya
- value (disambiguation)
- value judgments
- value judgments in social science
- value of a variable
- value theory
- values
- values and facts
- Bas C. van Fraassen
- Franciscus Mercurius van Helmont
- Peter van Inwagen
- Giulio Cesare Vanini
- Vardhamana Jnatrputra
- Vardhamāna Jnātrputra
- Francisco Varela
- variable
- variable realization
- variable sum game
- vasana
- vāsanā
- Vasubandhu
- Vatsyayana
- Vātsyāyana
- Emerich de Vattel
- Gianni Vattimo
- Thomas Vaughan
- Luc de Clapiers de Vauvenargues
- Vauvenargues
- Gabriel Vazquez
- Gabriel Vázquez
- Veda
- Vedanta
- Vedānta
- Vedas
- vegetarianism
- veil of ignorance
- veil of perception
- velleity
- vengeance
- John Venn
- Venn diagram
- verifiability
- verifiability theory of meaning
- verification
- verification principle
- verificationism
- verisimilitude
- Veritatis Splendor
- Nicoletto Vernia
- Verstehen
- verum
- vibratinuncle
- vice
- vices
- vicious circle
- vicious circle principle
- vicious-circle principle
- vicious regress
- Giambattista Vico
- Milan Vidmar
- Vienna Circle
- Vijnanavada
- Vijñānavāda
- vijnapti
- vijñapti
- Michel Villey
- Tommaso de Vio
- violence
- vipassana
- vipassanā
- virtù
- virtu
- virtue
- virtue epistemology
- virtue ethics
- virtue theory
- virtues
- virtues and vices
- virtuous circle
- Vishnu
- vision
- Visistadvaita Vedanta
- Viśistadvaita Vedanta
- visual arts and design
- Vital du Four
- vital lie
- vitalism
- Francisco de Vitoria
- Juan Luís Vives
- Gregory Vlastos
- Eric Voegelin
- void
- Voidism
- volition
- Voltaire
- voluntariness
- voluntarism
- voluntary act
- voluntary euthanasia
- August von Ciezkowski
- Edouard von Hartmann
- Hermann von Helmholtz
- Wilhelm von Humboldt
- Rudolf von Jhering
- John von Neumann
- G.H. von Wright
- G. H. von Wright
- Georg Henrik von Wright
- Vorstellung
- vortex theory
- voting paradox
- vulnerability
- vulnerability and finitude
- Lev Vygotskii
- Lev Semenovich Vygotskii
- Lev Semënovich Vygotskii
- Lev Vygotsky
- Lev Semenovich Vygotsky
- Boris Vysheslavtsev
- Boris Petrovich Vysheslavtsev

W

- Friedrich Waissman
- Alfred Russel Wallace
- Michael Walzer
- wang
- wang and pa
- Wang Chong
- Wang Chuanshan
- Wang Ch'ung
- Wang Fu-chih
- Wang Fuzhi
- Hao Wang
- Wang Pi
- Wang Yang-ming
- Wang Yangming
- want-belief model
- war and peace
- war and philosophy
- war of all against all
- James Ward
- Geoffrey J. Warnock
- Mary Warnock
- warranted assertability
- Warsaw School
- John Broadus Watson
- Tetsuro Watsuji
- Watsuji Tetsurō
- wave mechanics
- wayward causal chain
- weak law of large numbers
- weak semantic completeness
- weak soundness
- weak supervenience
- weakness of will
- Max Weber
- Karl Emil Maximilian Weber
- Weber-Fechner law
- wedge argument
- Simone Weil
- Ota Weinberger
- Welfare
- welfare economics
- welfare liberalism
- welfarism
- well-being
- well-formed formula
- well-ordered set
- well ordered set
- well ordering
- Weltanschauung
- Wertrationalitat
- Wertrationalität
- Edward Westermarck
- Western philosophy
- Hermann Weyl
- Weyl's paradox
- Frantisek Weyr
- František Weyr
- Franz Weyr
- wff
- Wheel of life
- William Whewell
- Benjamin Whichcote
- Thomas White
- white horse paradox
- Alfred North Whitehead
- why
- why be moral
- wide content
- wide reflective equilibrium
- David Wiggins
- Ken Wilber
- will
- Wille
- William Ockham
- William of Alnwick
- William of Auvergne, Bishop of Paris
- William of Auxerre
- William of Champeau
- William of Conches
- William of Heytesbury
- William of Moerbeke
- William of Ockham
- William of Sherwood
- Bernard Williams
- Bernard A. O. Williams
- Bernard Arthur Owen Williams
- will to believe
- will to live
- will to power
- Willkur
- Willkür
- John Cook Wilson
- Wilt Chamberlain argument
- Wilhelm Windelband
- P. G. Winch
- wisdom
- John Wisdom
- Wissenschaftslehre
- John Witherspoon
- Ludwig Wittgenstein
- Ludwig Josef Johann Wittgenstein
- Wittgensteinian ethics
- Wittgensteinians
- Adam Wodeham
- Adam de Wodeham
- Christian Wolff
- William Wollaston
- Richard Wollheim
- Mary Wollstonecraft
- Nicholas Wolterstorff
- women in philosophy
- Wonchuk
- Wonch'uk
- Wônch'ūk
- Wonhyo
- Wōnhyo
- woof
- work
- worker control
- works
- world-soul
- worldline
- worldview
- Chauncey Wright
- Crispin Wright
- G. H. von Wright
- Georg Henrik von Wright
- Jerzy Wroblewski
- Jerzy Wróblewski
- wu
- wu-hsing
- wu wei
- Wilhelm Wundt
- Wilhelm Maximilien Wundt
- John Wyclif

X

Xenocrates
- Xenophanes
- Xenophon
- xin
- xing
- Xun Zi

Y

Yajnavalkya
- yang
- Yang Chu
- Yang Xiong
- Yangzhu
- Yen Yuan
- Yi Ching
- Yi Hwang
- Yi I
- Yi Kan
- Yi Yulgok
- Yijing
- yin
- yin and yang
- Francis Parker Yockey
- Yoga
- Yogācāra Buddhism
- yong
- Yoruba epistemology
- Young Hegelians
- You are what you think
- Arthur M. Young
- you-wu distinction
- yü
- yu
- Yugoslav philosophy
- yung

Z

Z
- Jacopo Zabarella
- Peter Wessel Zapffe
- Zarathustra (fictional philosopher)
- ZC
- Zeami Motokiyo
- Zeigarnik effect
- Zeitgeist
- Eduard Zeller
- zen
- Zeno of Citium
- Zeno of Elea
- Zeno of Sidon
- Zeno of Tarsus
- Zeno's paradoxes
- Ernst Zermelo
- Zermelo-Fraenkel set theory
- zero-sum
- ZF
- ZFC
- Philip Zhai
- Zhang Zai
- Zheng Xuan
- zhi
- Zhi Dun
- Zhiyi
- Zhongyong
- Zhou Dunyi
- Zhou Guoping
- Zhu Xi
- Zhuangzi
- Zimboe
- Zionism
- Slavoj Žižek
- Florian Znaniecki
- Zohar
- Zombie
- Zongmi
- Zorn's lemma
- Zoroaster
- Zoroastrianism
- Zou Yan
- Xavier Zubiri
- Zweckrationalität
----
List of philosophical topics (A-C) --
(D-H) --
(I-Q) --
'(R-Z)'

See also