Dr. Robert Sachs, a professor of mathematics at George Mason University, wrote: “You blew it! Let me explain. If one door is shown to be a loser, that information changes the probability of either remaining choice, neither of which has any reason to be more likely, to 1/2.” Another writer with a Y-chromosome commented: “You cannot apply feminine logic to odds. The new situation is one of two equal chances.” And another, even less charmingly: “You are the goat!”