Muslims claim that because Muhammad was illiterate, he could not
have written the Qur’an, and thus the Qur'an is a miracle,
Muhammad's primary miracle. This idea of illiteracy is supported
in the Qur’an: Sura 7:157: "Those who follow the apostle, the
unlettered Prophet, whom they find mentioned in their own
(scriptures), - in the law and the Gospel... Sura 7:158 – Say:
"O men! I am sent unto you all, as the Apostle of God, to Whom
belongeth the dominion of the heavens and the earth: there is no
god but He: it is He That giveth both life and death. So believe
in God and His Apostle, the Unlettered Prophet, who believeth in
God and His words: follow him that (so) ye may be guided." Thus,
the Qur’an’s very existence is testimony to Muhammad’s status as
a prophet. There are a couple of problems with this position.