An Inconsistency-Adaptive Deontic Logic for Normative Conflicts

Journal of Philosophical Logic 42 (2):285-315 (2013)
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Abstract

We present the inconsistency-adaptive deontic logic DP r , a nonmonotonic logic for dealing with conflicts between normative statements. On the one hand, this logic does not lead to explosion in view of normative conflicts such as O A ∧ O ∼A, O A ∧ P ∼A or even O A ∧ ∼O A. On the other hand, DP r still verifies all intuitively reliable inferences valid in Standard Deontic Logic (SDL). DP r interprets a given premise set ‘as normally as possible’ with respect to SDL. Whereas some SDL-rules are verified unconditionally by DP r , others are verified conditionally. The latter are applicable unless they rely on formulas that turn out to behave inconsistently in view of the premises. This dynamic process is mirrored by the proof theory of DP r

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Author Profiles

Joke Meheus
University of Ghent
Mathieu Beirlaen
University of Ghent

References found in this work

In Contradiction: A Study of the Transconsistent.Graham Priest - 1987 - Dordrecht, Netherland: Oxford University Press.
Agency and Deontic Logic.John F. Horty - 2001 - Oxford, England: Oxford University Press.
Paraconsistent Logic.Graham Priest - 2008 - Stanford Encyclopedia of Philosophy.

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