While all logic puzzles defy intuition to some degree (hence their being “puzzles”), the Green Eyes one is among the few where the solution remains difficult to grasp even after it is known (at least for me). When I stumbled back across it recently, I spent a good hour thinking the answer must be wrong, …
I recently came across the unexpected hanging paradox, and it’s been a surprisingly tricky one to work through. The paradox goes as follows (from Wikipedia): A judge tells a condemned prisoner that he will be hanged at noon on one weekday in the following week but that the execution will be a surprise to the prisoner. …
Throughout history, people have sought to identify accurate statements about the world, so as to better understand the state of our existence. In many domains, this is a difficult endeavor – the world is often messy and inexact, and does not lend itself to easy classification. However, certain simplified domains have yielded more easily; particularly …