+26The mind is a weapon, we use it everyday. We can consider it our most important asset. But people forget that while the mind is our friend, it is also our enemy.
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+91My dog swallowed my mother's wedding ring. I'm not worried at all, though. You can always find a diamond in the ruff, amirite?
Four intellectuals are lined up so that each intellectual can see the ones in front of him but not the ones behind him. (The back one can see the other three, and the front one can't see anybody.) One hat is placed on the heads of each of the intellectuals. (None of them may see the color of their own hat, but each may see the color of the hats on the intellectuals in front of him.) Each of the four hats are one of three different colors (red, white, and blue), and there is at least one hat of each color (so there's one duplicate). Each of the intellectuals, starting with the back and ending with the front, is asked the color of the hat he is wearing. Each of the intellectuals is able to deduce and give a correct answer out loud, in turn. What arrangement of the hats permits this to be possible without guessing (since the specific colors chosen are arbitrary, just indicate which two intellectuals must be wearing hats of the same color), and how did they do it?