underdetermination thesis See PHILOSOPHY OF SCI -. ENC.

undefeated See EPISTEMOLOGY.

uniformity of nature a state of affairs thought to be required if induction...

unconscious See FREUD, JUNG.

union See SET THEORY.

undemonstrable argument See THEMA. underdetermination, perceptual. See FIGURE – GROUN.

undecidable See CONVENTIONALISM.

understanding See DILTHEY, EXPLANATION, VERSTE-. HE.

underdetermination, theoretical See OPERATIONAL-. ISM , THEORY -LADE.

Unamuno Miguel de (1864–1936), Spanish philosopher, scholar, and writer. Born in...

tzu jan Chinese term meaning 'naturally', 'spontaneity', or 'so-of-itself'. It is a...

type-type identity See PHILOSOPHY OF MIND.

Udana See NYAYA-VAISHESIKA.

type epiphenomenalism See PHILOSOPHY OF MIND.

types, theory of See TYPE THEORY. type theory, broadly, any theory according to...

type physicalism See PHYSICALISM.

type–token distinction as drawn by Peirce, the contrast between a category and...

type theory, ramified See TYPE THEORY.

types, simple theory of See TYPE THEORY.

Übermensch See NIETZSCHE.

unary quantifier See PLURALITIVE LOGIC.

uncertainty principle See PHILOSOPHY OF SCIENCE,. QUANTUM MECHANIC.

tu quoque See INFORMAL FALLACY.

tychism (from Greek tyche, 'chance'), Peirce's doctrine that there is absolute...

truth-table method See TRUTH TABLE.

truth-value gaps See MANY-VALUED LOGIC, PRESUP-. POSITIO. truth-value semantics, interpretations of formal...

Tung Chung-shu (c.179–c.104 B.C.), Chinese philosopher, a Han scholar famous for his...

Tsou Yen (350?–270? B.C.), Chinese cosmologist, a member of the Chi-hsia Academy...

truth table a tabular display of one or more truth-functions, truth-functional operators,...

truth-value most narrowly, one of the values T (for 'true') or...