(This is a reference to a logic puzzle about islanders who are able to tell whether they have blue eyes due to someone telling the world that someone has blue e

(This is a reference to a logic puzzle about islanders who are able to tell whether they have blue eyes due to someone telling the world that someone has blue eyes. Puzzle at http://xkcd.com/blue_eyes.html http://xkcd.com/blue_eyes.html , solution at http://xkcd.com/solution.html http://xkcd.com/solution.html .)