converse of implication

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• Converse implication — is the converse of implication. That is to say; that for any two propositions P and Q, if Q implies P, then P is the converse implication of Q. It may take the following forms: p⊂q, Bpq, or p←q Contents 1 Definition 1.1 Truth table 1.2 …   Wikipedia

• converse — ● converse adjectif et nom féminin (latin conversa, de convertere, convertir) Dans la logique aristotélicienne, se dit d une proposition dont la place du sujet et la place de l attribut ont été interverties par rapport à une autre proposition.… …   Encyclopédie Universelle

• Converse nonimplication — In logic, converse nonimplication is a logical connective which is the negation of the converse of implication. Contents 1 Definition 1.1 Truth table 1.2 Venn diagram …   Wikipedia

• Converse (logic) — In logic, the converse of a categorical or implicational statement is the result of reversing its two parts. For the implication P → Q, the converse is Q → P. For the categorical proposition All S is P, the converse is All P is S. In neither case …   Wikipedia

• Propositional calculus — In mathematical logic, a propositional calculus or logic (also called sentential calculus or sentential logic) is a formal system in which formulas of a formal language may be interpreted as representing propositions. A system of inference rules… …   Wikipedia

• Logical connective — This article is about connectives in classical logic. For connectors in natural languages, see discourse connective. For connectives and operators in other logics, see logical constant. For other logical symbols, see table of logic symbols. In… …   Wikipedia

• Outline of logic — The following outline is provided as an overview of and topical guide to logic: Logic – formal science of using reason, considered a branch of both philosophy and mathematics. Logic investigates and classifies the structure of statements and… …   Wikipedia

• LOGIQUES NON CLASSIQUES — La logique formelle «classique» (cf. histoire de la LOGIQUE, LOGIQUE MATHÉMATIQUE, théorie de la DÉMONSTRATION) est une théorie de l’inférence valide qui ne prend pas en considération le contenu sémantique de l’argument. Elle est une logique… …   Encyclopédie Universelle

• Material conditional — The material conditional, also known as material implication, is a binary truth function, such that the compound sentence p→q (typically read if p then q or p implies q ) is logically equivalent to the negative compound: not (p and not q). A… …   Wikipedia

• Entailment — For other uses, see Entail (disambiguation). In logic, entailment is a relation between a set of sentences (e.g.,[1] meaningfully declarative sentences or truthbearers) and a sentence. Let Γ be a set of one or more sentences; let S1 be the… …   Wikipedia

• Contraposition — 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… …   Wikipedia