In this paper we investigate the flouting of Grice's maxims in the Hamlet story, through an extensive and in depth discourse analysis. Hamlet is a detective story and a mystery play of a deeper kind in the medieval sense. The unexpected death of Hamlet's father has called him back and, according to the ethics of the age, it is his duty to avenge his father's murder. The revelations of the ghost of Hamlet' s father succeed the struggle between Claudius, who tries to keep his guilt hidden, and Harnlet, who tries to bring it to light. Hamlet assumes madness not to conceal any plan of revenge, but as a means "to be in presence of all, and yet to be hidden, to be intelligible to himself, and a perplexity to others, to be within reach with everyo...