Abstract
An inconsistency measure is a function mapping a knowledge base to a non-negative real number, where larger values indicate the presence of more significant inconsistencies in the knowledge base. In order to assess the quality of a particular inconsistency measure, a wide range of rationality postulates has been proposed in the literature. In this paper, we survey 15 recent approaches to inconsistency measurement and provide a comparative analysis on their compliance with 18 rationality postulates. In doing so, we fill the gaps in previous partial investigations and provide new insights into the adequacy of certain measures and the significance of certain postulates.
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Notes
Consider a lottery of n tickets and let \(a_{i}\) be the proposition that ticket i, \(i=1,\ldots ,n\) will win. It is known that exactly one ticket will win (\(a_{1}\vee \ldots \vee a_{n}\)) but each ticket owner assumes that his ticket will not win (\(\lnot a_{i}\), \(i=1,\ldots ,n\)). For \(n=1000\) it is reasonable for each ticket owner to believe that he will not win but for e. g., \(n=2\) it is not. Therefore larger minimal inconsistent subsets can be regarded less inconsistent than smaller ones.
Note that proofs of [43] are for propositional probabilistic logic. As this is a generalization of propositional logic, the results apply here as well.
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Thimm, M. On the Compliance of Rationality Postulates for Inconsistency Measures: A More or Less Complete Picture. Künstl Intell 31, 31–39 (2017). https://doi.org/10.1007/s13218-016-0451-y
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DOI: https://doi.org/10.1007/s13218-016-0451-y