[smussmann]

In at least some religions, [part of] the definition of God is that he is the uncaused cause. Thomas Aquinas spends a lot of ink talking about this (there's a more accessible explanation at http://www.peterkreeft.com/topics/first-cause.htm, but I'm pretty sure you can find the originals on the Internet).

[zbyte64]

Just because God can't imagine an existence outside herself doesn't mean it doesn't exist. She assumes she is the original cause but is unable to test the hypothesis.

[humanrebar]

In other words, what if an all-knowing being doesn't really know everything?

Or are you inventing a new Creator who is merely almost omniscient for rhetorical purposes? To what end?