Omniscience is fundamentally incompatible with free will. Someone with true free will can exercise their judgement in making choices in their life. If God is truly omniscient, then he already knows the results of those choices before they are made. Logically, this implies that there was only one possible choice to begin with - the choice God knows about. All other choices were illusory because you were for-ordained to choose the option God knew you would choose. If he does NOT know and learns as you make those choices, then he is no longer omniscient.

Omnipotence is inherently contradictory because it pits creative ability against performance. If you can create anything, then you can create a puzzle no one can solve, an unliftable object, an intangible force ... and yet having no limits to your performance, you can solve that puzzle, lift that object and perceive or sense that force. The two sides of omnipotence cancel each other out in a logical conundrum.