A teacher asked: Who shot John F Kennedy
The entire class was silent.
The teacher went on: this is ridiculous, is there no one who can say who shot JFK?
One boy reluctantly got up and said: Maam I don't know who did it, but surely I didn't'
another teacher asked a boy 'where is the Alps'
the boy said 'don't know maam'
teacher: Stand up on the bench
boy: will be able to see it from there maam'