tautologies

Philosophy dictionary. . 2011.

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  • tautologies — tautology …   Dictionary of sociology

  • tautologies — tau·tol·o·gy || tÉ” tÉ‘lÉ™dʒɪ / tÉ’l n. needless repetition of same idea in different words …   English contemporary dictionary

  • Tautology (logic) — In propositional logic, a tautology (from the Greek word ταυτολογία) is a propositional formula that is true under any possible valuation (also called a truth assignment or an interpretation) of its propositional variables. For example, the… …   Wikipedia

  • Tautologie — La tautologie (du grec ὁ ταυτὸς λόγος, le fait de redire la même chose) est une phrase ou un effet de style ainsi tourné que sa formulation ne puisse être que vraie. La tautologie peut aussi s apparenter au truisme ou à une lapalissade. En… …   Wikipédia en Français

  • Tautologique — Tautologie La tautologie (du grec tauto logos, le fait de redire la même chose) est une phrase ou un effet de style ainsi tourné que sa formulation ne puisse être que vraie. La tautologie peut aussi s apparenter au truisme ou à une lapalissade.… …   Wikipédia en Français

  • Tautologisme — Tautologie La tautologie (du grec tauto logos, le fait de redire la même chose) est une phrase ou un effet de style ainsi tourné que sa formulation ne puisse être que vraie. La tautologie peut aussi s apparenter au truisme ou à une lapalissade.… …   Wikipédia en Français

  • Axiom — This article is about logical propositions. For other uses, see Axiom (disambiguation). In traditional logic, an axiom or postulate is a proposition that is not proven or demonstrated but considered either to be self evident or to define and… …   Wikipedia

  • Boolean algebra — This article discusses the subject referred to as Boolean algebra. For the mathematical objects, see Boolean algebra (structure). Boolean algebra, as developed in 1854 by George Boole in his book An Investigation of the Laws of Thought,[1] is a… …   Wikipedia

  • Boolean algebra (introduction) — Boolean algebra, developed in 1854 by George Boole in his book An Investigation of the Laws of Thought , is a variant of ordinary algebra as taught in high school. Boolean algebra differs from ordinary algebra in three ways: in the values that… …   Wikipedia

  • Logical truth — is one of the most fundamental concepts in logic, and there are different theories on its nature. A logical truth is a statement which is true and remains true under all reinterpretations of its components other than its logical constants. It is… …   Wikipedia

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