New Password: The correct password will be one of: Man 1, Man 2, Man 3 or Man 4 and the correct explanation to the question.
Four men are standing in a row looking forward, about 4 feet apart, each are wearing a hat. They are numbered sequentially 1-4. The man in the back is #1. There is a solid brick wall between Man 3 and Man 4. Two of the hats are black, two are white and they don't know the color of their own hat. Man 2 is wearing a white hat and Man 3 is wearing a black hat. The men may not turn around and may not make any communication with one exception: In 10 mins the men will be eliminated unless one of them correctly calls out what color hat he himself is wearing. Which man will callout the color of his hat correctly and why?