[Serious] Could an omnipotent and omniscient god prove that he was God?

[GrandizerII]

Ok, so since reality (at least outside of human actions) is "metaphysically given", and there is no such thing as random chance, then is it conceivable to have reality be the way it is now (instead of another way) without random chance playing a role here? If something "just is" with no reason behind it, doesn't this suggest some form of indeterminism?

Fair point about what you said regarding cognition and knowledge in the next paragraph. Can't say I disagree there (well, aside from a couple of sentences).

The only thing that just is without a cause is the universe or the total of what exists.  It's perfectly right to ask about causes within the universe since that is where causality happens.  That's where things exist and act according to their nature.  That's causality, entities acting and interacting according to their nature and only according to their So an Oak tree has a cause and you have a cause, but existence as a whole does not because there's nothing outside of existence to be a cause.  But once an Oak tree exists, it is necessary.  Once your parents have you, you are necessary.  A spec of dust is necessary because it exists.  

What random chance refers to is our inability to predict something.  A dice coming up on two sixes isn't a random chance, it's causality.  If we could measure all the forces acting on the dice we could predict the outcome.  Causality applies within the universe but not to the universe.  That's eternal and uncaused.  When a human being makes a choice that isn't random chance either but causality.  Causality is the identity of action not a relationship between events.  

The universe is all causes, all actions, all relationships, all nature, all motion, change, attributes, everything, therefore it can't be caused.

The total of what actually exists appears to be quite arbitrary if the total is basically this universe or a limited range of universes. Perhaps for you, this doesn't raise any big questions and therefore you're content with what just is, but for me, it's a question still worth considering.