Later in Act 1 (scene 5) Hamlet tells Horatio that he will put “an old-fashioned disposition”. This is the appearance we see through Act 2, but the question remains: does Hamlet actually practice what he is saying or deliberate and begin at a later time; he is already angry at the beginning of the show or much later than we are told. Which is similar to executing his plan to kill Claudius “with wings as swift as meditation.” Frankly, Hamlet doesn't always do what he says he's going to do. Therefore we tend to say that what he says and what he does is only part of the façade that Shakespeare presents to the audience. Following this line of thought would lead to the conclusion that Hamlet may have gone mad as soon as the ghost finished talking to him alone. So Shakespeare could have given Horatio's character a stupid euphemism: "What could deprive you of the sovereignty of reason and drag you into madness?" While this is not what it seems, this is the reality. This would provide a valid explanation for why after Hamlet speaks to the ghost, only he is able to hear the ghost. This is seen by the fact that Hamlet is the first person in any case to respond to the ghost. It would suggest that Hamlet can hear it as the ghost is in Hamlet's head. An alternative interpretation is the way Marcellus and Horatio treat Hamlet