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To build such a crash-resistant system, the designer must be able to imagine - and disallow - the dumbest action. He or she cannot simply rely on the user's intelligence: who knows who will be on the other side of the program? Besides, teh user's intellligence is not quantifiable; it's not programm…

Quietly, I say, "You know, that's what the Nazis did."

They all look at me in disgust. It's the look boys give a girl who has interrupted a burping contest. One says, "This is something my wife would say."

When he says "wife," there is no love, warmth, or goodness in it. In this engineer's mo…