After reading your comment, I immediately headed over to Wikipedia to refresh my memory on the Monty Hall problem. The results of my search are a good illustra

After reading your comment, I immediately headed over to Wikipedia to refresh my memory on the Monty Hall problem. The results of my search are a good illustration of why I love the internet: http://en.wikipedia.org/wiki/Monty_hall_problem http://en.wikipedia.org/wiki/Monty_hall_problem The article is nearly 6000 words and includes diagrams, detailed mathematical explanations, a very detailed synopsis of the history of the problem, and links to like 50 sources. All for a probability puzzle. Unbelievable.