Bable Fish argument.
"I refuse to prove that I exist," says
God, "for proof denies
faith, and without faith, I am
nothing."
"Oh," says man, "but the Babel Fish is a dead give-away, isn't it? It proves You exist, and so therefore You don't."
"Oh, I hadn't thought of that," says
God, who promptly vanishes in a puff of logic.
"Ah, that was easy," says man, and for an encore goes on to prove that black is white, and gets killed on the next zebra crossing.
Most leading thinkers claim that this argument is a load of dingo's kidneys.