Resumo

SIERRA-ARISTIZABAL, Manuel. Logic of the tautologies. ing.cienc. [online]. 2012, vol.8, n.15, pp.97-119. ISSN 1794-9165.

Is presented as extension of classical propositional calculus, the deductive system LT: logic of the tautologies. In the LT system, the meta-logical notions of tautology, contradiction, refutable and contingency are formalized. The LT system, is characterized as a Kripke-style semantic, and can be seen as an extension of the modal logic system S₅.

Palavras-chave : Tautology; contradiction; contingency; modal logic; possible worlds.

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