An angel comes down to earth, and visits a philosopher. The angel says to the philosopher, "God will answer one question for you - it can be anything at all. What would you like to ask him?" The philosopher thinks, and thinks, and can't decide, so he asks the angel to give him some more time. The angel comes back a few weeks later and the philosopher says "Okay, I've thought it through, and I've got it. I would like to know the pair consisting of the best question I could possibly ask, and its answer." So, the angel goes back up to heaven, and tells God the question, and God thinks it through, calculates, very quickly (he's God), and gives the angel the answer. The angel goes back to earth, and finds the philosopher. "Do you have it?!?" the philosopher asks, with great anticipation. "Yes," says the angel, "the best possible question is the one that you asked, and the answer is the one I've just given you."