In the major premise, Imam al-Ṣādiq was not upon the view of those who claimed his imamate falsely and slanderously against him

In the major premise, Imam al-Ṣādiq—peace be upon him—was not upon the claim of those who asserted his imamate by falsehood and slander against him. Rather, the leading figures among the descendants of al-Ḥusayn—peace be upon them—were not upon the Imāmī (Twelver) methodology at all, such that one could move on to subsequent discussions. Nor did he see in himself any superiority over his uncle. Thus, apart from the Zaydī path, this constitutes a departure from liability for singularity in the claim.

And Imam al-Ṣādiq—peace be upon him—declared his disavowal of those who fabricated lies against him, saying:

“No one has introduced into Islam what Zurārah has introduced of innovations. Upon him is the curse of God.”

(Rijāl al-Kashshī, 1/149)

Thus the Rāfiḍah were followers of Zurārah and stood in opposition to al-Ṣādiq—peace be upon him.