Skwim, when you say "Perhaps you do, but I don't." I'm thinking you mean that you remain uncomvinced that an omnipotent being is necessarily also omnicient and omnipresent. Questioning the premise to ensure its actually valid before employing it seems like a wise move to me. I'm big on advocating that we take great care in questioning what we think we know or are prepared to assume.
Where I've come to on this is a point where I am ready to acknowledge that an allegedly omnipotent being would theoretically be able to know all that it is possible for it to know, but would not necessarily know all. My understandings of matters epistomological include an understanding that knowledge is relationally entangled and therefore limitted to the relational reach of a sentient being.
Lets play this out: A proposed omniscient, omnipresent God would necessarily have to be actually all that is and also the relational sum of all that is (in keeping with basic ZF set theory) in order to be all knowing in keeping with this understanding. In essence, there could be nothing external to it and it would necessarily have to know itself absolutely and have complete knowledge of its knowledge of itself, and complete knowledge of its knowledge of its knowledge of itself, and complete...
Further, I think, and I'm no expert here, that in the field of epistemology it is widely held that there cannot be absolute, complete knowledge because justified true knowledge involves a necessary infinite regress of justifications. In an actually infinite reality knowledge may be justified infinitely, but never absolutely.
Another paradox with omnicience would seem to be that a proposed omniscient being would not have free will! How could it? This is well trodden territory in philosophy and I think pretty well established, but... ? [Another spin off thread?] Also, how can a being without free will be considered omnipotent?
Given (?) all of this then, how could a God actually be omnipotent, omniscient and/or omnipresent? None of these seem to be logically possible characteristics for an actually existent being to have . The only way to sustain such a claim or belief then is to logically establish that logic may be disregarded and that we should accept that a God that is impossible by definition can and does actually exist.
Neat trick that would be eh?! I'm not about to try it. I'm pretty sure Penn & Teller would decline trying too.
I've obviously skipped along too quickly here. Right?
Basically, 'I think' I've established that omnicience is an impossible characteristic for an actually existent being to have. It seems also that I've established that an posited omnipotent being could not actually exercise that absolute omnipotent power [paradox alert!] and that therefore there cannot be an actually existent omnipotent being.
Fictional: Sure Real: Uh-uh
Not ruled out is the possiblity that a posited God could be very powerful and very knowledgable. But then, neither have we established any need to posit any kind of god in order to explain anything or everything, nor any evidence indicating the existence of any such God.
'I think' I've overplayed my hand trying to pack all of this into these little message boxes.
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Someone, please find the holes in my reasoning.
0zy