 The hallmarks of Ibn Rushd’s work are his convictions that philosophy is capable of demonstrative certainty in many domains, that it is Aristotle who should be our preeminent guide in philosophy, and that philosophy should play a central role within religious inquiry, rather than being an alternative to religion. But part of what gives his ideas their enduring interest is the subtle way in which he promotes other methods of reasoning and persuasion in contexts where the rigors of Aristotelian demonstration are not a practical option. To grasp Ibn Rushd’s thought in full requires attending not only to the Aristotelian commentaries where he attempts to develop philosophy as a demonstrative science, but also to areas like religion, medicine, and law, where constraints of both subject-matter and audience require other argumentative and rhetorical techniques.