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		Jehar on Jan 3, 2014 \| parent \| context \| favorite \| on: Blue Eyes Logic Puzzle That's a good point, but then the critical factor is that nobody knows how many people have blue eyes. More specifically, each person has to hold the possibility that n = observed persons with blue eyes + 1, which is himself.

maxerickson on Jan 3, 2014 [–]

That's why it takes n days.

Each blue eyed person can see n-1 others. If nothing happens on day n-1, they learn that they have blue eyes.

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