—either an identical miracle or one equal to it in evidentiary force, even if it is of a different kind. The signs of his prophethood ﷺ are, in fact, greater and more numerous, and the knowledge of their transmission is definitive: the period is close to us, the transmitters are many, their lands and generations are diverse, and it is impossible that they all conspired in a lie. Certainty about the signs of his prophethood is therefore on the same level as certainty about his very existence and public appearance. If it were permissible to cast doubt on all of that, it would be even more permissible to doubt the existence of Jesus and Moses and the signs of their prophethoods; but if casting doubt on them and on their miracles is impossible, then doubting Muhammad ﷺ and the signs of his prophethood is even more impossible. (1)
If Muhammad had not appeared, prophethood would have collapsed:
Had Muhammad ﷺ not appeared, the prophethood of all the other prophets would have been nullified, for the manifestation of his prophethood confirms theirs and testifies to their truthfulness. His very being sent is one of the signs granted to the prophets before him. God, Exalted is He, alludes to this when He says, “Rather, he has come with the truth and has confirmed the messengers” (Q 37:37). The messengers had given glad tidings of him and foretold his coming; his advent is therefore the embodiment of the truth of their report. His appearance constitutes a confirmation for them, being the concrete realization of what they foretold. This does not contradict the other explanation—that his confirming the messengers means his attestation to their truth and his faith in them—for he confirmed them both by his words and by his arrival: he testified to their truth through his coming, and he testified to their truth through his speech. A parallel is found in the words of the Messiah, as God Most High relates in the Noble Quran: “ … confirming what is before me of the Torah and bringing good news of a messenger who will come after me whose name is Ahmad” (Q 61:6). For when the Torah had given glad tidings of him