1st question, “Can God make a mistake, or be wrong?”
Dub answer is, “No!”
2nd question, “Why not?”
Dub answer is, “Because he can’t, he’s God!” In other words, it’s axiomatic (you might even call it the Ultimate Axiom).
3rd question, “So, if you, as a tiny speck who has never met God, living on a tiny speck of a planet, orbiting a medium sized sun, in a large galaxy, in a massive universe, know that God, who is bigger than an infinite number of universes, cannot make a mistake or be wrong, do you not think that the angels know that as well?”
Dub answer is, “Of course they do.”
Final question then, “So, when Satan first laid down his challenge in the Garden of Eden, do you think that any of the angels might have thought along the lines, ‘Hold on a minute there Jehovah, we think Satan may have a point here.’ To which God replied, ‘Oh dear, I’d better prove he’s wrong then.’ and then preceded to throw his creation into thousands of years of chaos, evil, untold misery and darkness to prove something that didn't need proving - an axiom?”
And herein lies a paradox. Even a moron knows that you do not have to prove an axiom, in fact, generally speaking you can’t - that’s the whole point of them. So by setting out to prove an axiom, God was making a mistake. If everyone knew he couldn’t be wrong, he didn’t need to prove it, but by doing so, what he actually proved was that he could be wrong and make mistakes.
But if it is not a mistake, then there is no axiom, which brings us full circle to question 1, which must therefore be answered without assuming it is axiomatic. So how do you go about proving the answer is “No”? – well the method of proof God is supposed to have chosen is to throw his creation into thousands of years of unspeakable cruelty, evil and darkness. But we won’t know if he proves his point until the end of the 1000 year reign of Christ. So until then, you cannot answer the question. If you try, you are, in the words of the WTS, "going beyond the things written".