The Question
The debate is not over whether the Imam matters for salvation — across the major Shia traditions there is broad agreement that he does — but over how decisive the correct identification of the Imam is, and, by extension, which line is the true one. Both sides accept a shared starting point: that faith and works are anchored in recognition of, and devotion to, the rightful Imam of the age. The dispute is whether deeds performed in allegiance to a wrongly identified Imam are merely deficient or wholly void, and whether the rightful line runs through the Twelver Imams ending in occultation, or through the Ismaili-Tayyibi succession leading to the Dai al-Mutlaq.
Why it matters: if recognition of the right Imam is the very condition that makes worship valid, then the inter-Shia disagreement is not a secondary jurisdictional matter but a question about salvation itself. Each tradition reads the same foundational sources — the report on ‘knowing the Imam’ and the Quranic imagery of futile deeds — and applies the shared principle to its own line, so the argument over application carries unusually high stakes.
The Twelver Critique
The Twelver critique, set out in Ali Azhar Arastu’s booklet Examining the Ismaili Imams and the Bohras, holds that the choice of Imam is soteriologically decisive. It rests on the widely transmitted prophetic report that whoever dies without knowing (or having pledged to) the Imam of his age dies a death of jahiliyya — pre-Islamic ignorance — and pairs this with Quran 24:39, which likens the deeds of those who deny faith to a mirage in a desert that a thirsty man takes for water until he reaches it and finds nothing. Read together, the critique argues, these texts mean that worship offered under a misidentified Imam is not partially rewarded but rendered void, like a mirage that dissolves on approach.
From this the critique draws its conclusion: because identifying the Imam correctly is the hinge on which the acceptance of all deeds turns, the question cannot be treated as optional or merely communal, and (the author contends) it is the Twelver line of Imams from Ali to al-Mahdi that is the rightful one to be recognized. The argument is therefore presented not as a critique of the principle of the Imam’s necessity — which it affirms — but as a claim that the Ismaili-Bohra application of that principle fastens onto the wrong line.
The Ismaili-Tayyibi Response
In its own terms, the Dawoodi Bohra Ismaili tradition does not contest the premise at all; it embraces it. Recognition of the rightful Imam — walayah, devotion and loyal attachment to the Imam of the time — is held to be the foundation upon which faith (iman) and righteous works rest, and without which outward acts of worship lack their inner reality. The tradition affirms that deeds draw their value from being offered within the covenant of walayah, and reads the ‘knowing the Imam’ report as confirming, not undermining, the centrality of the Imam to salvation. On this understanding the report is common ground rather than a weapon for one side.
The point of difference is the identity of the line. The Ismaili-Tayyibi tradition holds the rightful succession to be the Ismaili one, continuing through the twenty-one manifest Imams to al-Tayyib and thereafter sustained in concealment, with the Imam’s authority exercised in his name by the Dai al-Mutlaq. Within this framework, walayah of the Imam and obedience to the Dai are presented as the living heart of faith — the outward bay’a expressing an inner bond — so that for the believer the very same principle invoked by the critique is fulfilled by attachment to this line and its present custodian.
Scholarly Assessment
Academic historians of Shia Islam such as Farhad Daftary, Wilferd Madelung, and Heinz Halm treat the underlying premise — that early Shia piety bound salvation to recognizing the rightful Imam — as an authentically early and widely shared feature of Shia thought, not the invention of any one branch; the ‘knowing the Imam of one’s age’ motif appears across Shia traditions. What scholarship regards as contested rather than settled are the rival applications and the polemical claims attached to them: the competing genealogies and succession lists, and charged stories raised in inter-Shia polemic — such as the hostile “mad caliph” image of al-Hakim bi-Amr Allah, the “slave-girl” genealogy argument against the Fatimids, and the informer story attached to Muhammad ibn Isma’il — which historians record as claims advanced by opponents rather than as established fact. On the soteriological question itself, scholars note that whether a given line is the true one is a matter of faith that historical method does not adjudicate.
See also: Scholarly Debates Overview, Bayah And Walayah, Isma Infallibility And The Imamate, Number Of Imams Debate, Dawr Al Satr Concealment Doctrine