excluded middle, principle of
(or law of )
The logical law asserting that either p or not-p . It excludes middle cases such as propositions being half correct or more or less right. The principle directly asserting that each proposition is either true or false is properly called the law of bivalence.

Philosophy dictionary. . 2011.

Look at other dictionaries:

  • principle of the excluded middle — noun (logic) The principle that a thing must be either one thing or its contradictory • • • Main Entry: ↑principle …   Useful english dictionary

  • Excluded middle — Exclude Ex*clude , v. t. [imp. & p. p. {Excluded}; p. pr. & vb. n. {Excluding}.] [L. excludere, exclusum; ex out + claudere to shut. See {Close}.] 1. To shut out; to hinder from entrance or admission; to debar from participation or enjoyment; to… …   The Collaborative International Dictionary of English

  • principle of excluded middle — law of excluded middle …   Useful english dictionary

  • Law of excluded middle — This article uses forms of logical notation. For a concise description of the symbols used in this notation, see Table of logic symbols. In logic, the law of the excluded middle states that the propositional calculus formula P ∨ ¬ P ( P or not P… …   Wikipedia

  • law (or principle) of the excluded middle Logic — the principle that one (and one only) of two contradictory propositions must be true. → exclude …   English new terms dictionary

  • law of the excluded middle — law (or principle) of the excluded middle Logic the principle that one (and one only) of two contradictory propositions must be true …   Useful english dictionary

  • law of the excluded middle — Contradiction Con tra*dic tion, n. [L. contradictio answer, objection: cf. F. contradiction.] 1. An assertion of the contrary to what has been said or affirmed; denial of the truth of a statement or assertion; contrary declaration; gainsaying.… …   The Collaborative International Dictionary of English

  • of excluded middle — (logic) The principle that everything is either true or false ● exclude …   Useful english dictionary

  • law of excluded middle — a principle in logic: if one of two contradictory statements is denied the other must be affirmed * * * Logic. the principle that any proposition must be either true or false …   Useful english dictionary

  • law of excluded middle — Logic. the principle that any proposition must be either true or false. * * * …   Universalium

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