Theory of appearing the theory that to perceive an object is simply for...

Theory of descriptions an analysis, initially developed by Russell, of sentences containing descriptions....

Theory of effluxes See DEMOCRITUS.

Theory of Forms See PLATO.

Theory of frequency See PROBABILITY.

Theory of relativity See RELATIVITY.

Theory of signs the philosophical and scientific theory of information-carrying entities, communication, and...

Theory of types See TYPE THEORY.

Theory theory See SIMULATION THEORY.

Theory-laden dependent on theory; specifically, involving a theoretical interpretation of what...

Theory, scientific See PHILOSOPHY OF SCIENCE.

Theosophy any philosophical mysticism, especially those that purport to be mathematically...

Theravada Buddhism See BUDDHISM.

Thermodynamics, first law of See ENTROPY.

Thermodynamics, second law of See ENTROPY.

Thesis See HEGEL.

Theurgy See NEOPLATONISM.

Thing See METAPHYSICS.

Thing-in-itself See KANT.

Third Man argument See PLATO.

Thirdness See PEIRCE.

Thisness See HAECCEITY.

Thomas Aquinas See AQUINAS.

Thomism the theology and philosophy of Thomas Aquinas. The term is...

Thomson Judith Jarvis (b.1929), American analytic philosopher best known for her...

Thoreau Henry David (1817–62), American naturalist and writer. Born in Concord,...

Thought, language of See MEANING, MENTALESE,. PHILOSOPHY OF LANGUAG. thought experiment, a technique...

Thrasymachus (fl. 427 B.C.), Greek Sophist from Bithynia who is known...

Three Profound Treatises See NEO-TAOISM.

Three Ways See BONAVENTURE.