theoretical concept See THEORETICAL TERM.

theoretical reason in its traditional sense, a faculty or capacity whose province...

theorem See AXIOMATIC METHOD, DEDUCTION.

theoretical construct See THEORETICAL TERM.

theory, scientific See PHILOSOPHY OF SCIENCE.

theoretical reasoning See PRACTICAL REASONING.

Theophrastus See HELLENISTIC PHILOSOPHY, PERI -. PATETIC SCHOO.

theological virtues See AQUINAS.

theology, natural See PHILOSOPHY OF RELIGION,. THEOLOGIA NATURALI.

theology, supernatural See THEOLOGIA NATURALIS.

theology of liberation See LATIN AMERICAN PHILOS-. OPH.

theologia naturalis (Latin 'natural theology'), theology that uses the methods of investigation and...

theological voluntarism See VOLUNTARISM.

theological creationism See PREEXISTENCE. theological naturalism, the attempt to develop a naturalistic...

theology, philosophical See METAPHYSICS.

terminus ad quem See TERMINUS A QUO.

tertiary qualities See QUALITIES.

Thales of Miletus (fl. c.585 B.C.), Greek philosopher who was regarded as one...

theodicy (from Greek theos, 'God', and dike, 'justice'), a defense of...

terminist logic a school of logic originating in twelfth-century Europe and dominant...

Tertullian (A.D. c.155–c.240), Latin theologian, an early father of the Christian...

testimony an act of telling, including all assertions apparently intended to...

Tetens Johann Nicolas (1736–1807), German philosopher and psychologist, sometimes called the...

testability in the sciences, capacity of a theory to undergo experimental...

terminus a quo (Latin 'term from which'), the starting point of some process. The...

Themistius See COMMENTARIES ON ARISTOTLE.

thema (plural: ta), in Stoic logic, a ground rule used to...

Tetractys See PYTHAGORAS.

Theodorus See CYRENAICS.

Telesio Bernardino (1509–88), Italian philosopher whose early scientific empiricism influenced Francis...