“Imagine a conference podium with four micros. After pressing the button of one of the micros, there is a little red light on the very same micro. Guess which of the micros is switched on.”
* DAU = Dümmster anzunehmender User; being short of a direct translation, the DAU is best described as the person you have in mind when thinking about idiot-proof systems. If there were such a thing.
La puce, die Welt and everything else 