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Common knowledge revisited

R. Fagin, J. Y. Halpern, Y. Moses, M. Vardi

cs.LOarXiv:cs/9809003

Abstract

We consider the common-knowledge paradox raised by Halpern and Moses: common knowledge is necessary for agreement and coordination, but common knowledge is unattainable in the real world because of temporal imprecision. We discuss two solutions to this paradox: (1) modeling the world with a coarser granularity, and (2) relaxing the requirements for coordination.

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