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Skeptical Inheritance: Computing the Intersection of Credulous Extensions

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Proceedings of the Eleventh International Joint Conference on Artificial Intelligence. Commonsense Reasoning. Pages 1153-1159.

Abstract

Ideally skeptical inheritance supports exactly those inferences true in every credulous extension of an inheritance hierarchy. We provide a formal definition of ideally skeptical inheritance. We show that two path -based approaches fail to capture ideally skeptical inheritance, and that there are inheritance hierarchies for which there are more always-true inferences than always-supported paths. We describe an ATMS-like scheme that computes ideally skeptical inheritance and represents hierarchical dependencies using a limited form of Boolean satisfiability. Finally, we demonstrate a preemption (specificity) strategy for which ideally skeptical inheritance is polynomial-time computable.

Lynn Andrea Stein. 1989. Skeptical Inheritance: Computing the Intersection of Credulous Extensions. In Proceedings of the Eleventh International Joint Conference on Artificial Intelligence, IJCAI-89. IJCAI, 1153–1159. https://ijcai.org/proceedings/1989/185
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