Normality operators and Classical Recapture in Extensions of Kleene Logics

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Abstract
In this paper, we approach the problem of classical recapture for LP and K3 by using normality operators. These generalize the consistency and determinedness operators from Logics of Formal Inconsistency and Underterminedness, by expressing, in any many-valued logic, that a given formula has a classical truth value (0 or 1). In particular, in the rst part of the paper we introduce the logics LPe and Ke3 , which extends LP and K3 with normality operators, and we establish a classical recapture result based on the two logics. In the second part of the paper, we compare the approach in terms of normality operators with an established approach to classical recapture, namely minimal inconsistency. Finally, we discuss technical issues connecting LPe and Ke3 to the tradition of Logics of Formal Inconsistency and Underterminedness.
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Archival date: 2018-10-28
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On the Logic of Theory Change: Partial Meet Contraction and Revision Functions.Alchourrón, Carlos E.; Gärdenfors, Peter & Makinson, David
The Logic of Paradox.Priest, Graham

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2018-10-28

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