Muhammad’s bad memory.
Godwin questions a Muslim on the reliability of the Qur’an given Islamic tradition teaches Muhammad had a bad memory.
“A’isha reported that the Apostle of Allah heard a person reciting the Qur’an at night. Upon this he said: May Allah show mercy to him; he has reminded me of such and such a verse which I had missed in such and such a surah.” (Sahih Bukhari 6:61:556; Sahih Muslim 4:1720)