“The argument goes something like this: 'I refuse to prove that I exist,' says God, 'for proof denies faith, and without faith I am nothing.'

'But,' says Man, 'the Babel fish is a dead giveaway, isn't it? It could not have evolved by chance. It proves you exist, and so therefore, by your own argument, you don't. QED.'

'Oh, dear,' says God, 'I hadn't thought of that,' and he promptly vanishes in a puff of logic.”