‘I refuse to prove that I exist,’ says God, ‘for proof denies faith, and without faith I am nothing.’
‘But,’ says Man, ‘This mathematics proves you exist, and so therefore, by your own arguments, you don’t. QED.’
‘Oh dear,’ says God, ‘I hadn’t thought of that,’ and promptly disappears in a puff of logic.
‘Oh, that was easy,’ says Man, and for an encore goes on to prove that black is white and gets himself killed on the next zebra crossing.