List of common misconceptions
The correct answer to the Monty Hall Problem is that the contestant should indeed switch doors. The original problem is as follows: on a game show, there are three closed doors, one hiding a car and each of the other two doors concealing a goat. The contestant, wishing to win the car, selects a door. The door remains closed while the host, knowing where the car is hidden, proceeds to reveal a goat behind one of the remaining doors, and then offers the contestant a chance to switch his or her initial choice of door to the other closed door. Should the contestant switch?  The correct answer is that the contestant should switch, as it doubles the chances of winning the car.