The assertion that Amirul Momineen (a.s) is alive is of an obdurate person, for the knowledge of his death and martyrdom is more famed than the story of the death of anyone else. To doubt his death encourages doubting the death of the Prophet and all of his companions. Furthermore, his final will and the prediction of the Prophet (s) that you will be killed and that your beard will be dyed with your blood also invalidates this claim. These are facts that do not require us to bring narrations to prove them.