In this ambitious study, Alexander W. Hall examines the two preeminent figures of the golden age of natural theology: Thomas Aquinas and John Duns Scotus. Hall is not so much concerned with retracing particular proofs of the existence of God and derivations of the divine attributes—well-worn paths in discussions of medieval natural theology—as with investigating the larger philosophical issues that are raised by the project of natural theology, such as the nature of scientia and demonstrative arguments, and accounts of signification and the meaningfulness of theological discourse.Hall's opening chapter offers an overview of natural theology in the High Middle Ages, summarizing the conclusions he will defend at greater length over the course of the book. In chapter 2 Hall relies primarily on Aquinas's commentary on the Posterior Analytics to get clear on his account of scientia, or scientific knowledge. "For Aquinas," Hall writes,"paradigmatic scientia is the result of syllogistic reasoning . . . Syllogisms productive of scientia use either real or nominal definitions as their middle, and thus the conclusion tells us what belongs to the subject through itself or per se"