discussed at length here with like four hundred comments https://terrytao.wordpress.com/2008/02/05/the-blue-eyed-islanders-puzzle/ https://terrytao.wordpress.co

discussed at length here with like four hundred comments https://terrytao.wordpress.com/2008/02/05/the-blue-eyed-islanders-puzzle/ https://terrytao.wordpress.com/2008/02/05/the-blue-eyed-isla...