The normally lucid philosopher John Searle gets himself turned all cattywumpus when it comes to God:
"For us", he writes in Mind, Language and Society, "if it should turn out that God exists, that would have to be a fact of nature like any other. To the four basic forces in the universe--gravity, electromagnetism, weak and strong nuclear forces--we would add a fifth, the divine force. Or more likely, we would see the other forces as forms of the divine force. But it would still be all physics, albeit divine physics. If the supernatural existed, it too would have to be natural."
Among the attributes which comprise our concept of God is transcendence. God is the creator of physics, not a part of it. Searle is saying, in effect, that if a transcendent being exists then that being is not transcendent. This is what both philosophers and laymen call nonsense.
Searle is in a tough spot. He cannot bring himself to admit the possibility that the universe is the created product of an intelligent being which exists apart from that which He created, but neither can he deny the possibility that God exists. So he's reduced to announcing that should God exist, He wouldn't really be God. This is the sort of claim that gives philosophy a bad reputation.
Thanks to The Philosophers' Magazine Online's Daily Philosophical Quotation for the tip.