Full Idea
The very idea of omniscience is dubious, at least for the communitarian epistemologist, since knowing is a social state, and knowledge is a social status, needing a position in a social network.
Gist of Idea
Omniscience is incoherent, since knowledge is a social concept
Source
Martin Kusch (Knowledge by Agreement [2002], Ch. 4)
Book Reference
Kusch,Martin: 'Knowledge by Agreement' [OUP 2004], p.42
A Reaction
A nice test case. Would an omniscient mind have evidence for its beliefs? Would it continually check for coherence? Is it open to criticism? Does it even entertain the possibility of error? Could another 'omniscient' mind challenge it?