We also demonstrated the invalidity of the promoters of the Imamate of Ja’far Ibn Ali, namely, the Fatahiyya, who believe in the Imamate of Abdullah Ibn Ja’far after the demise of Imam Sadiq عليه السلام. And when Abdullah passed away without leaving any son, they came back to the Imamate of Musa Ibn Ja’far and after him proclaimed the Imamate of Hasan Ibn Ali. And when Hasan Ibn Ali died, they claimed the Imamate of Ja’far. Their belief is false for the reasons we invalidated the Imamate of Ja’far Ibn Ali and because there is no disagreement amongst the Imamiyah that Imamate cannot pass from one brother to another after Hasan and Husain and we have brought in that regard great many traditions.