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Conference Papers Year : 1995

A local approach to reasoning under inconsistency in stratified knowledge bases

Abstract

This paper investigates an approach for reasoning under inconsistency in a "local" way, in prioritized knowledge bases. In such bases, the higher the layer, the more certain, the more reliable are the formulas stored in this layer. The proposed approach is based on the notion of (consistent) argument whose strength depends on the layer of the least certain formulas involved in the argument. Each formula in the base is also associated with a "level of paraconsistency" which reflect to what extent there exists arguments that support both a formula and its negation. Three consequence relations are presented and compared. Two of them aim at maximizing the certainty degree and/or at minimizing the level of paraconsistency of the conclusion. The third one produces consequences that are safely supported in the sense that there exists an undefeated argument for them (whose certainty is greater than its paraconsistency).
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Dates and versions

hal-03299846 , version 1 (03-09-2021)

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Salem Benferhat, Didier Dubois, Henri Prade. A local approach to reasoning under inconsistency in stratified knowledge bases. 3rd European conference Symbolic and Quantitative Approaches to Reasoning and Uncertainty (ESCQARU 1995), Jul 1995, Fribourg, Switzerland. pp.36-43, ⟨10.1007/3-540-60112-0_5⟩. ⟨hal-03299846⟩
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