A puzzle about belief updating

Author: Martini Carlo  

Publisher: Springer Publishing Company

ISSN: 0039-7857

Source: Synthese, Vol.190, Iss.15, 2013-10, pp. : 3149-3160

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Abstract

In recent decades much literature has been produced on disagreement; the puzzling conclusion being that epistemic disagreement is, for the most part, either impossible (e.g. Aumann (Ann Stat 4(6):1236–1239, 1976)), or at least easily resolvable (e.g. Elga (Noûs 41(3):478–502, 2007)). In this paper I show that, under certain conditions, an equally puzzling result arises: that is, disagreement cannot be rationally resolved by belief updating. I suggest a solution to the puzzle which makes use of some of the principles of Hintikka’s Socratic epistemology.