* Problem: If a student to the Italian coast was € 100 thousand (underestimate), and 5 out of 20 graduates go abroad as a researcher and nobody is doing research in Italy, how much money he threw away the Italian state?
Answer: € 20 100 thousand times (and not 5 times), because to see the tip of the pyramid (5 researchers) must have made the selection mechanism, which is the base of the pyramid.
meditate.
* taken from a true story.
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