Here's XKCD's blue-eyes problem http://www.xkcd.com/blue_eyes.html http://www.xkcd.com/blue_eyes.html and solution: http://xkcd.com/solution.html http://xkcd.co

Here's XKCD's blue-eyes problem http://www.xkcd.com/blue_eyes.html http://www.xkcd.com/blue_eyes.html and solution: http://xkcd.com/solution.html http://xkcd.com/solution.html