Common Knowledge

Common knowledge is information that everyone knows (andand, importantly, that everyone knows that everyone knows, and so on, ad infinitum.) If information is 'common knowledge'common knowledge in a group of people, that information that can be relied and acted upon with the trust that everyone else is also coordinating around that information. This stands, in contrast, to merely publicly known information where one person cannot be sure that another person knows the information, or that another person knows that they know the information. Establishing true common knowledge is, in fact, rather hard.

See also: Public discourse

Common knowledge is information that everyone knows (and everyone knows that everyone knows, and so on, ad infinitum.) It'sIf information is 'common knowledge' in a group of people, that information that can be relied and acted upon in a group of people.with the trust that everyone else is also coordinating around that information.

Common knowledge is information that everyone knows.

(More accurately, it's also information thatknows (and everyone knows that everyone knows, and so on, ad infinitum.) It's information that can be relied and acted upon in a group of people.

In the context of Aumann'Common knowledge is information that everyone knows.

(More accurately, it's agreement theorem, a fact is part of the common knowledge of a group of agents when they all know it, they all knowalso information that they all know it,everyone knows that everyone knows, and so onon, ad infinitum.)

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