Riddle Friday
Four criminals, all
facing the same direction, are on a few steps in a line. The fourth man is
separated from the other three by a wall. Because of this, the first man
can see the second and third man in front of him, the second man can only see
the third man, and the third and fourth men can see no one.
Each
criminal is wearing a hat, but they don’t know which color their own hats are.
They are told, however, that there are two black hats and two white hats among
them.
They are instructed to shout out their hat colors once they’ve figured
out which color it is.
They also
have been given rules: They may not move or turn around at all, they may not
speak a word to each other, and they must not take their hats off at any point.
Assuming they all follow the rules, which one of them is the first to speak up,
and why?
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