Actually, what I've said is that A, B, and C are all independent of one another.
I would think that someone totally knowledgeable would be quite an asset EVEN IF he couldn't pick up a 2 pound weight.
Logically that does not follow, because God cannot be Omnipresent if He's not Omnipotent. Neither can He be Omniscient if he's not Omnipotent. If God is not Omnipotent, he's not God, for God IS Omnipotent.