Proceedings

Entailment Semantics for Rules with Priorities

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Proceedings of the Twentieth International Joint Conference on Artificial Intelligence. Pages 256-260.

Abstract

We define a new general rule-based non-monotonic framework which allows an external acyclic priority relation between rules to be interpreted in several ways. Several entailment semantics are defined via a constructive digraph, with one being given a declarative fixed-point characterisation as well. The framework encompasses Default Logic, ground Answer Set Programming (ASP), and Defeasible Logic. Default Logic is provided with a new semantics which is ambiguity blocking, rather than the usual ambiguity propagating semantics. Also Reiter-extensions are given a new fixed-point characterisation; and Lukaszewicz’s m-extensions are given a much simpler construction and fixed-point characterisation.

David Billington. 2007. Entailment Semantics for Rules with Priorities. In Proceedings of the Twentieth International Joint Conference on Artificial Intelligence, IJCAI-07. IJCAI, 256–260. https://ijcai.org/proceedings/2007/39
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