2008 Oct 10, 1:32Xkcd providing answers to questions that I forgot I had, like what is the answer to the lawn-sprinkler question from Surely You're Joking Mr. Feynman. "Feynman used to tell a story about a simple
lawn-sprinkler physics problem. The nifty thing about the problem was that the answer was immediately obvious, but to some people it was immediately obvious one way and to some it was immediately
obvious the other. (For the record, the answer to Feynman problem, which he never tells you in his book, was that the sprinkler doesn't move at all. Moreover, he only brought it up to start an
argument to act as a diversion while he seduced your mother in the other room.)"
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