If it is said: Is it not that some have opposed your beliefs; like those who believe that Mahdi is from the progeny of Ali , but not from the progeny of Husain, instead he is from the progeny of Muhammad bin Hanfiyyah? Among your opponents are Sabaiyya who believe that Ali has not died. Some have said that he is Ja’far Ibn Muhammad, who has not died. Some have said: He is Hasan Ibn Ali Askari and he has not died. Some have said that the Mahdi is his brother, Muhammad Ibn Ali, who is alive and has not died. What is your argument to invalidate these claims? We will say: We have invalidated all of them by proving that the individuals they believe to be alive are dead, and by proving that the Imams are Twelve, and by the rational arguments concluding the Imamate of Ibn Hasan through the miracles that prove his Imamate and through the narratives of his birth and his miracles that prove his Imamate.