contrapositive
11contrapositive — I. |kän.trə|päzəd.iv adjective Etymology: contraposition + ive : of, relating to, or characterized by contraposition II. noun logic : a proposition resulting from the operation of contraposition …
12Contraposition — For contraposition in the field of traditional logic, see Contraposition (traditional logic). For contraposition in the field of symbolic logic, see Transposition (logic). Contraposition is a logical relationship between two propositions, or… …
13Contraposition (traditional logic) — In traditional logic, contraposition is a form of immediate inference in which from a given proposition another is inferred having for its subject the contradictory of the original predicate, and in some cases involving a change of quality… …
14Raven paradox — The Raven paradox, also known as Hempel s paradox or Hempel s ravens is a paradox proposed by the German logician Carl Gustav Hempel in the 1940s to illustrate a problem where inductive logic violates intuition. It reveals the problem of… …
15Mathematical proof — In mathematics, a proof is a convincing demonstration (within the accepted standards of the field) that some mathematical statement is necessarily true.[1][2] Proofs are obtained from deductive reasoning, rather than from inductive or empirical… …
16Transposition (logic) — In the methods of deductive reasoning in classical logic, transposition is the rule of inference that permits one to infer from the truth of A implies B the truth of Not B implies not A , and conversely . [Brody, Bobuch A. Glossary of Logical… …
17logic — logicless, adj. /loj ik/, n. 1. the science that investigates the principles governing correct or reliable inference. 2. a particular method of reasoning or argumentation: We were unable to follow his logic. 3. the system or principles of… …
18Term test — In mathematics, the nth term test for divergence[1] is a simple test for the divergence of an infinite series: If or if the limit does not exist, then diverges. Many authors do not name this test or give it a shorter name.[2] Cont …
19inverse — I. adjective Etymology: Middle English, turned upside down, from Latin inversus, from past participle of invertere Date: 15th century 1. opposite in order, nature, or effect 2. being an inverse function < inverse sine > II. noun Date: circa 1681 …
20List of philosophy topics (A-C) — 110th century philosophy 11th century philosophy 12th century philosophy 13th century philosophy 14th century philosophy 15th century philosophy 16th century philosophy 17th century philosophy 18th century philosophy 19th century philosophy220th… …
