The question is: how should we listen to the voice of the ghost, the voice of the phantom father? Should we take it as an authority, and is Hamlet's problem that he does not immediately do what the ghost tells him to do ("Revenge this foul and most unnatural murder")? Or would he not rather be a kind of psychotic if he immediately did so? Helped by Lacan's third lecture in Seminar XI I will make the claim that Hamlet's problem is his being too occupied with the ontological state of the ghost (his famous motto is pure ontology: To be or not to be) and too little with its ethical state. Just like some of those sceptics who doubt the existence of the unconscious in stead of recognizing its insistence.