[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
        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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