The idiot
This story took place at a mental hospital.
The mentally retarded group of young men gathered around the swimming pool which did not have a drop of water. They pretended swimming with different styles and techniques just like the pool was full of water. The doctor was watching the group and noticed there was one man who did not swim, so he walked up to the patient:
Doctor: why are you not swimming?
Young man: Haha, you must not be a doctor, you must be one of them idiots.
The doctor thought that this patient realized the stupidity of others, so he went on.
Doctor: Oh, so you know that there is no water right?
Young man: You are getting more crazy. There’s water, it’s just that I don’t wanna drown, I can’t swim.