Dealing With Multi-Source Information in Possibilistic Logic

In this paper, both the uncertainty and the origin of pieces of information is handled in an extended possibilistic logic framework and the combination of the information provided by different sources, taking possibly into account the relative reliability of the sources, is discussed.

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. 1 Motivations Often, the available information comes from several sources rather than from a unique source. The information provided by each source may be incomplete and pervaded with uncertainty. The global information given by the different sources may be partially inconsistent due to the presence of conflicting pieces of information coming from various sources, even if each so...