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From: gwyn@brl-smoke.ARPA (Doug Gwyn )
Newsgroups: net.puzzle
Subject: another hat puzzle
Message-ID: <815@brl-smoke.ARPA>
Date: Mon, 10-Feb-86 16:02:31 EST
Article-I.D.: brl-smok.815
Posted: Mon Feb 10 16:02:31 1986
Date-Received: Thu, 13-Feb-86 17:18:27 EST
Reply-To: gwyn@brl.ARPA
Organization: /usr/local/lib/news/organization
Lines: 10

Three men (could be women, but these are men's hats) are in a room.
They are blindfolded and one black hat apiece is placed on each
of their their heads.  The blindfolds are removed and they are
told:  "Your hat is either red or black.  Not all three are red.
The first one to tell his own hat's color without looking at his
own hat wins a prize; if you guess wrongly you pay a fine."
Some time passes; finally, one of the men speaks up and wins the
prize.  Explain his reasoning.

(Please don't post your answer; you'll know if you have it right.)