As for the Nawusiyya, who express uncertainty after Ja’far Ibn Muhammad عليه السلام, we explained the invalidity of their belief, as we know that Imam Ja’far Sadiq عليه السلام passed away and that his son Musa Ibn Ja’far rightly succeeded him and that the Imamate of the Twelve Imams is a proven fact. The fact that he expressly confided a final will, underscores our point.