Omniscience Argument Against God's Existence

[Rational AKD]

He could have worded it better, I agree.

But I think the gist of the premise was "You cannot know what you don't know you don't know unless the state of affairs change such that you know what you don't know."

but that doesn't really fit in his argument. if you can't know what you don't know then you have a lack of knowledge if you don't know something. but if there is nothing you don't know, you can't say "well you don't know what you can't know therefore you don't know everything." knowing everything means what you don't know is equivalent to nothing, so you can't take that nothing and treat it as something.