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Chris Miller
Chris Miller, Internet Researcher
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three people have dots on their foreheads, either red or blue.

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three people have dots on their foreheads, either red or blue. They do't know the color of thier dot, but can see the color of the dots on the people with them. They make a pact, whoever discovers the coclor of thdeit dot must cook breakfast for everyone the next morning. They are walking through the woods and come across a talking grizzly bear who tells them at least one of them has a blue dot. On days one and two nothing happens, on day three they are all cooking breakfast.

Hello,

 

They finally arrive at the simultaneous conclusion that all three have blue dots on their foreheads. After the bear tells them at least one of them has a blue dot, if only one had a blue dot, that person would immediately have known the color of her own dot upon seeing red dots on the foreheads of the other two. If two of the three had blue dots, one of those two would have soon figured out that her dot was blue when the other person with a blue dot didn't immediately proclaim her dot as blue. So finally, it dawns on each of the three that the color of her dot must be blue.

 

Hope this helps!



Edited by XXXXX XXXXX on 9/29/2010 at 11:56 PM EST
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