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Incidence Calculus

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Original languageEnglish
Title of host publicationEncyclopedia of Artificial Intelligence
EditorsS. C. Shapiro
PublisherJohn Wiley & Sons Inc.
ISBN (Print)0471503053
Publication statusPublished - 1992


We describe incidence calculus, a logic for probabilistic reasoning. In incidence calculus, probabilities are not directly associated with formulae. Rather sets of possible worlds are directly associated with formulae and probabilities are calculated from these. This enables incidence calculus to be truth functional, which a logic based on a purely numeric uncertainty measure cannot be. This, in turn, enables tighter probablity intervals to be calculated for theorems of an incidence calculus theory than is possible in a purely numeric uncertainty theory.

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