When analysing Hamlet during Act 1, it is notable that he is normal, confident and outgoing, while talking with Horatio regarding the ghost.
However, after he sees the apparition for himself, Hamlet seems slightly over persistent, ensuring Marcellus and Horatio promise their silence about their knowledge of accurances regarding what they have just witnessed.
This shows that Polonius also finds this behaviour to be odd, proving Hamlet has changed or acted out of place - not normally.
If Hamlet had in fact been acting normally, then it would be fair to say that he is a natural 'madman' or faker, but he was not.
He was enforcing his cunning plan, and it would appear he has created the confusion and controversy he was looking for.
Hamlet continues to dazzle when talking with Polonius during Act 11, sc 11, confirming Polonius' prediction in just one quick conversation.The final transition into derangement occurs early in the 1V act, when he refers to himself in the third person.Hamlet is a man that uses this feigned madness originally as a justification for his repeated cowardice.This scene occurs at the opening of Hamlets adaptatious play, with Hamlet appearing to be excited and eager to witness Claudius' reaction.Hamlet, in a jestive yet educated manner, commentates the occurrences on the stage to Ophelia.Unfortunately for Ophelia this sends her over the edge - all because it aided Hamlet in creating a sense of bamboozling behavior.This aids Hamlet, because he destroys ant theory Claudus or Polonius had for his unknown madness.This is absorbing, as Polonius, although sporting a pre-disposed theory on Hamlet's intriguing state of mind, is surprised at what he sees.This is evidence, once again, that Hamlet has not always been like this.An interesting thing happens during Act 111, sc 11, that gives the impression Hamlets 'sane personality' can be ruthlessly cruel to others in order to gain what he desires.In this scene, Hamlet appears to be 'back in love' with Ophelia, flirting with her after he rejected her advances.