Three engineers, a Brit, a Frenchman, and an Austrian, were found guilty of treason in a former French-African colony. The sentence was death by guillotine, but the engineers were given a choice of receiving the penalty face-up, or face-down.
The Brit chose face-up and the blade miraculously stopped inches short of his throat. This was seen as a sign from God, and the Brit was set free. The French engineer also chose face-up, and once again, the blade stopped inches from the throat. Again, a miracle, and the Frenchman was set free.
The Austrian, not to be outdone, chose face-up, but just before the blade was released was heard to proclaim, "Wait a minute, I see the problem."