steven comments on The Fear of Common Knowledge - Less Wrong

21 Post author: Eliezer_Yudkowsky 09 July 2008 09:48AM

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Comment author: steven 09 July 2008 07:11:52PM 5 points [-]

Just to clarify, Hallq uses "mutual knowledge" as if it's synonymous to "common knowledge", but game theorists use the two terms as a contrast: mutual knowledge of A is when everyone knows A, common knowledge of A is when everyone knows that everyone knows that everyone knows (...) A. So this is about raising to common knowledge things that were merely mutual knowledge.