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-valued logic See MANY-VALUED LOGIC.

Three Ways See BONAVENTURE.

threshold, absolute See FECHNER.

threshold, relative See FECHNER.

t’i yung, Chinese terms often rendered into English as 'substance' and...

t’ien Chinese term meaning 'heaven', 'sky'. T'ien has a range of...

t’ien-jen ho-i Chinese term for the relationship between t'ien (Heaven) and human...

t’ien li jen-yü, Chinese terms literally meaning 'heavenly principles' and 'human desires',...

t’ien ming See MING.

Tillich Paul (1886–1965), German-born American philosopher and theologian. Born in Starzeddel,...

time 'a moving image of eternity' (Plato); 'the number of movements...

time lag argument See PERCEPTION.

time slice a temporal part or stage of any concrete particular that...

Timon of Philius See SKEPTICS.