> Posit what you believe, and I will be happy to refute it.

I believe that we cannot know anything (in the sense that it is usable as a scientific fact) about anything that is transcendental. Other than its existence or non-existence, perhaps.

> Again, only if one begs the question by presupposing that God could not reveal things about Himself to us in such a way that we can know them for certain.

Perhaps you could present some examples, assuming God has done such things already and your counter-argument is not purely hypothetical.