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Art. 10 – Vol. 21 – No. 2 – 2011

The Liar’s Paradox

Paul Sfetcu
psfetcu@yahoo.com
National Institute for Research & Development of Informatics – ICI Bucharest

Abstract: In this paper we present the oldest and the most difficult of all the paradoxes, appeared in the Greek Antiquity. We also present Anton Dumitriu’s solution, based on the clasic logic principles, the rules of definition and the formal system presented by B. Russell and A. Whitehead in Principia mathematica.

Key words: logical principles, tautology, negation

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