 The initial argument of the Incoherence focuses on apodeixis and the demonstrative character of the arguments refuted therein. While the book also touches on the truth of these teachings, it “refutes” numerous positions whose truths al-Ghazâlî acknowledges or which he subscribed to in his later works. In these cases al-Ghazâlî wishes to show that while these particular philosophical teachings are sound and true, they are not demonstrated. The ultimate source of the falâsifa’s knowledge about God’s nature, the human soul, or about the heavenly spheres, for instance, are the revelations given to early prophets such as Abraham and Moses. Their information made it into the books of the ancient philosophers who falsely claimed that they gained these insights by reason alone.