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Conference Papers Year : 2017

A Fuzzy Take on Graded Beliefs


Graded beliefs increase the expressiveness of any model representing beliefs, by allowing the introduction of modulation: it is then possible to model different levels of belief. The increased expressiveness raises issues regarding the interpretation of these levels as well as their combination. This paper addresses this issue proposing a fuzzy interpretation of graded beliefs, viewed as a fuzzy subset of the universe of well formed formulae, considering belief degrees as membership degrees to a belief set. It studies the consequences of this interpretation , for the definition of graded belief manipulation rules and of graded variants of the doxastic axioms KD45, leading to the proposition of conjunction, disjunc-tion, negation, implication and introspection rules for graded beliefs.
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hal-01591903 , version 1 (22-09-2017)



Bénédicte Legastelois, Marie-Jeanne Lesot, Adrien Revault d'Allonnes. A Fuzzy Take on Graded Beliefs. 10th Conference of the European Society for Fuzzy Logic and Technology (EUSFLAT 2017), Sep 2017, Varsovie, Poland. pp.392-404, ⟨10.1007/978-3-319-66824-6_35⟩. ⟨hal-01591903⟩
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