| Abstract: | We propose a modal logic based on three operators, representing intial beliefs, information and revised beliefs. Three simple axioms are used to provide a sound and complete axiomatization of the qualitative part of Bayes’ rule. Some theorems of this logic are derived concerning the interaction between current beliefs and future beliefs. Information flows and iterated revision are also discussed. Giacomo Bonanno: I am grateful to two anonymous reviewers for helpful and constructive comments. A first draft of this paper was presented at the Sixth Conference on Logic and the Foundations of Game and Decision Theory (LOFT6), Leipzig, July 2004. |
