In 1939, a team of British mathematicians set about breaking the Enigma code, a system used by the Axis forces to send and receive secret messages. The Enigma machine could be coded in 10 19 ways. Armed with statistical weapons, the team built a system that could significantly reduce the set of possibilities required to decode the Enigma machine. The Enigma code was broken every day, saving millions of lives and swinging the outcome of the war towards the Allies.
It is commonly held that people lie a lot during Exit Interviews. Some people therefore consider exit interviews an enigma! If this were true, it would indeed be a tragedy, for Exit Interviews are an excellent way to determine what is wrong with teams and H.R. policies.