Abductive Framework for Nonmonotonic Theory Change

Katsumi Inoue and Chiaki Sakama

Proceedings of the 14th International Joint Conference on Artificial Intelligence (IJCAI-95), pp. 204-210, Morgan Kaufmann, 1995.


This paper proposes a method of nonmonotonic theory change. We first introduce a new form of abduction that can account for observations in nonmonotonic situation. Then we provide a framework of autoepistemic update, which describes nonmonotonic theory change through the extended abductive framework. The proposed update semantics is fairly general and provides a unified framework for various update semantics such as first-order update, view update of databases, and contradiction removal of nonmonotonic theories.

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