Common knowledge

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Revision as of 01:40, 8 April 2009 by Gjm11 (talk) (Define. (There should be a link to the WP page Common_knowledge_(logic) but I haven't time right now...)
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In the context of Aumann's agreement theorem, a fact is part of the common knowledge of a group of agents when they all know it, they all know that they all know it, and so on ad infinitum.