The Logic of Persistence

Henry A. Kautz

A recent paper [Hanks1985] examines temporal reasoning as an example of default reasoning. They conclude that all current systems of default reasoning, including non-monotonic logic, default logic, and circumscription, are inadequate for reasoning about persistence. I present a way of representing persistence in a framework based on a generalization of circumscription, which captures Hanks and McDermott’s procedural representation.

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