Medieval Christian critics judged Qur’anic chapter names as proof of irrationality

Evidence

For Ricoldo this nomenclature was more specifically a sign of irrationality. The Qur’an, he said, has special chapters for the ant, the spider and smoke, unsuitable subjects for divine revelation. This was disingenuous; he must have known that the names of the stirahs do not claim to describe their contents. — Norman Daniel, Islam and the West, 329