Averroes' idea is different from the previous theories because the other ones hold that the universal intellect is superhuman and that each human individual has its own intellect, while Averroes identifies the single intellect with the mind of all humans.[3] While Averroes propounds his general ideas on human intellect in all of his three commentaries on Aristotle's On the Soul, this theory only appears in his final long commentary. He provides different theses for explaining human knowledge in his previous two commentaries, suggesting that the notion of unity of the intellect is his most mature theory after having considered other ideas.[1]