If Hamlet had gone to a psychoanalyst, he would have said: my stepfather is a decent man and also my mother is without flaw, but still I have a bad feeling. The fact that his mother and stepfather are murderers is so inconceivable that it could not penetrate his consciousness. But only the ghost, the spirit of his father, can convince Hamlet that his suspicion is justified. Here, we face the paradox that an individual has to act in a mad way to see the entire truth, which is from the viewpoint of the so called commonsense improbable.