2025•Unpublished venueOpen access

Common Knowledge and Common Belief

Hans van Ditmarsch, Jan van Eijck, Rineke Verbrugge

Abstract

Philosopher : Today, I suggest we discuss the important concepts of common knowledge and common belief. As far as I know, the first one to give a formal analysis of these concepts was the philosopher David Lewis, in his book Convention [ 140 ]. One of his examples is traffic conventions, about the role of common knowledge in how one behaves in road traffic. To explain this properly, I wonder if you would care to play a little game with me.

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Key concepts: Common knowledge (logic), Common sense, Common ground, Common cause and special cause, Common stock, Commonsense knowledge, Knowledge management, Knowledge-based systems