Botta... e risposta!
È un po'… sottile, lo so. 
How can you recognize a programmer in a crowd?
Ask everyone to count to ten. The programmer will start with zero. Everyone else will start with one.
How many fingers on both hands?
Eleven. Counting from the little finger, it's 10 - 9 - 8 - 7 - 6 and 5 more makes 11.
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