News for hackers. Stuff that matters.

A comment on Blue Eyes Logic Puzzle. Parent comment

Re:Blue Eyes Logic Puzzle by Jehar on Friday January 03, 2014 @02:35PM (#7007553)
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.
[ Parent | on HN ]
Re:Blue Eyes Logic Puzzle by maxerickson on Friday January 03, 2014 @02:40PM (#7007599)
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.

[ Parent | on HN ]