Five doctors went to on a duck hunt: a GP, a pediatrician, a psychiatrist, a surgeon, and a pathologist. After a while a bird came winging overhead.
The GP raised his shogun but did no shoot because he was not sure if it was a duck or not.
The pediatrician also raised his gun, but then he was not sure if it was a male or female duck, so he did not shoot.
The psychiatrist raised his gun and then thought, I know that this is a duck, but does the duck know it is a duck?
The surgeon was the only one who shot. Boom!! He blew it away. Then he turned to the pathologist and said,
Go see if that was a duck.