[lit-ideas] Re: Try a Logic Problem
- From: "Lloyd Mitchell" <rmitchell@xxxxxxxxxxxx>
- To: <lit-ideas@xxxxxxxxxxxxx>
- Date: Thu, 22 Jun 2006 11:04:07 -0700
Phil says:
3. If P2 can see that P3 is wearing a red hat, knowing that P1 must
see
a white hat, P2 would know that he is wearing a white hat.
See why #2 only needs one eye? Sure he can see both #1 and #3 with the same
eye. But all he needs to see is #3. If he doesn't see a red hat there, he
cannot know what's on his own head.
That's why when #3 hears #2 say I don't know, he knows exactly what color
he's wearing.
Piece of cake!
Lloyd Mitchell
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