Scott MacDonald

The purpose of the article is to offer a detailed exegetical analysis of the argument in chapter four of "de ente et essentia" in which aquinas argues for a distinction between "esse" and essence and to develop an interpretation of it on the basis of the analysis. I argue that the reconstructed argument shows that aquinas argues for a real distinction and that he establishes it earlier in the argument than some commentators have thought. I criticize a rival interpretation of the argument defended recently by joseph owens.

This volume is an important supplement to the two volumes in the series of Cambridge Histories covering the philosophy of the Middle Ages. Dronke's book, which adopts the format of the latter volume, is intended to fill the gap between them. It contains sixteen contributions by fifteen scholars. The contributions are arranged in four parts. The four essays in part 1, "Background," provide useful summaries of the intellectual inheritance that provides the cultural environment for what has been called the twelfth-century renaissance. These essays give us, for the first time I think, a clear and reasonably broad account of the historical and philosophical relations between twelfth-century thinkers and ancient thought. Part 2, "New Perspectives," contains four chapters, one on twelfth-century scientific speculations, one on the grammatical, logical, and semantic issues that grew out of interest in grammar, and two on logic during the period. These chapters are the most exciting in the book: they succeed in showing us not only some of what is new and distinctive in twelfth-century thought but also in taking us to the frontiers of some of the philosophically most interesting current research. Fredborg's "Speculative Grammar" and Jacobi's "Logic : The Later Twelfth Century" uncover some of the strange and intriguing roots of characteristically medieval developments in logic: issues such as the properties of terms, the theory of supposition, and fallacies; and methods such as the use of sophismata and instantiae.