[Bork]

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There are not "obvious" limits to omnipotence and omniscience. There are obvious PROBLEMS with claiming something is omnipotent and omniscient and trying to conceptualize that, and there are obvious "total BS assertions that I have no reason to accept" that are proposed to try to paper over those problems.

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Meh, most people (philosopher types) just accept that there on limits on God if he exists. You are definitely right about the papering over bit. It's the same with the 'trinity of the unity' types, once somebody just rejects simple logic and says God doesn't have to abide by it then the discussion can't really progress.
Out of curiosity:
Do you think God can know the unknowable if he exists? Do you think everything is knowable? If yes to the second question, why?