"You, sir, are an ignorant bigot."

It's said that the only rational stance is agnosticism because you can neither prove nor disprove the existence of the supernatural creator. I find that a weak position. It is true that you can't disprove anything but you can put a probability value on it. There's an infinite number of things that you can't disprove: unicorns, werewolves, and teapots in orbit around Mars. But we don't pay any heed to them unless there is some positive reason to think that they do exist.