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“Belief models, aggregation and impossibility”

Friday Oct 12th – 14:00-16:00
Room 508, Philosophy Building

The “Belief Models” framework is a very general formal theory of rational belief. It encompasses propositional logic belief sets, but also ranking functions and lower previsions (i.e. lower probabilities). De Cooman (2005) shows that AGM-style expansion and revision operators can be defined in this framework. In this paper I will discuss aggregation of belief models, and draw some connections to various well-known impossibility results for aggregation.