Belief.

Premise 1: To rationally believe that Islam is divinely true, one must believe that all Qur’anic claims are true.

Premise 2: There exists at least one Qur’anic claim (e.g., Jesus predicting Muhammad) for which no accessible evidence exists.

Premise 3 (epistemic principle): If a claim lacks evidence, one is not rationally justified in believing it. Therefore oneyis justified in not believing islam is true.

Btw there really is no evidence Jesus himself foretold Muhammad. Paraclete is verbatim used for the holy spirit. No textual variants indicating pariklytos is an alt reading. And as I said even then, the bible uses the word verbatim for the holy spirit.

Another claim the quran makes is that a pharaoh drowned. Well there's no evidence among Egyptologists for that. The Bucaille claim is evidenced / non-logically conclusive.