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Abstract : |
Abstract. In this paper, both the uncertainty and the origin of pieces of information is handled in an extended possibilistic logic framework. Each formula is associated with a set (a fuzzy set more generally) which gathers labels of sources according to which the formula is (more or less) certainly true. In case of a single source of information, possibilistic logic is recovered. Soundness and completeness results of possibilistic logic are extended. Besides, the combination of the information provided by different sources (fusion), taking possibly into account the relative reliability of the sources, is discussed., |
