Hamlet appears to be insane, after Polonius"s death, in act IV scene II. There are indications, though, that persuade me to think other wise. Certainly, Hamlet has plenty of reasons to be insane at this point. His day has been hectic-he finally determined Claudius had killed his father, the chance to kill Claudius confronted him, he comes very close to convincing Gertrude that Claudius killed his father, he accidentally kills Polonius, and finally the ghost of his father visits him. These situations are enough to bring Hamlet to insanity, but he remains sharp and credible. Hamlet is able to make...
the river? No, in-fact Hamlet was the opposite of what he was before. If he were crazy, like Ophelia, he would have remained hectic and random up until the time of and after the duel. Hamlet, though, was not-he even reasoned what death for him was, finishing his question of whether life was worth living for. Hamlet can truley be seen to be sane, and not. The facts that Hamlet was smart and swift thinking, and in such a reversal of emotions from after Polonius died in the end, leads strongly to the opinion that Hamlet was not insane.