Provably Correct Theories of Action (Preliminary Report)

Fangzhen Lin, Yoav Shoham

Research on nonmonotonic temporal reasoning in general, and the Yale Shooting Problem in particular, has suffered from the absence of a criterion against which to evaluate solutions. Indeed, researchers in the area disagree not only on the solutions but also on the problems. We propose a formal yet intuitive criterion by which to evaluate theories of actions, define a monotonic class of theories that satisfy this criterion, and then provide their provably-correct nonmonotonic counterpart.

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