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- W2078117620 abstract "Much of our everyday knowledge is risky. This not only includes personal judgments, but the results of measurement, data obtained from references or by report, the results of statistical testing, etc. There are two (often opposed) views in AI on how to handle risky empirical knowledge. One view, characterized often by modal or nonmonotonic logics, is that the structure of such knowledge should be captured by the formal logical properties of a set of sentences, if we can just get the logic right. The other view takes probability to be central to the characterization of risky knowledge, but often does not allow for the tentative or corrigible acceptance of a set of sentences. We examine a view, based on ε-acceptability that combines both probability and modality. A statement is ε-accepted if the probability of its denial is at most ε, where ε is taken to be a fixed small parameter as is customary in the practice of statistical testing. We show that given a body of evidence Γδ, the set of ε-accepted statements Γε has exactly the logical structure of a classical modal system EMN, the smallest classical modal logic E supplemented by the schemata M: □ε(⌜ φ ∧ ψ ⌝) → (□ε φ ∧ □ε ψ) and N: □ε⊤." @default.
- W2078117620 created "2016-06-24" @default.
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- W2078117620 date "2002-10-01" @default.
- W2078117620 modified "2023-09-27" @default.
- W2078117620 title "The Logic of Risky Knowledge" @default.
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- W2078117620 doi "https://doi.org/10.1016/s1571-0661(04)80552-8" @default.
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