SOURCE: "Logic and Metaphysics," in Aristotle: The Growth and Structure of His Thought, Cambridge at the University Press, 1968, pp. 111-32.

In the following excerpt, Lloyd discusses Aristotle's doctrine of categories, the syllogism, and the idea of scientific knowledge. In studying the works in which these topics are presented, Lloyd stresses the comprehensive, original, and lucid nature of Aristotle's writings on the subject of logic.

The first part of this study has been devoted to giving the outlines of Aristotle's intellectual development. In the second I shall take the main branches of his work in turn and attempt to describe and elucidate the fundamentals of his thought, locating his principal ideas in the context of the philosophical and scientific discussions of the time, and assessing their value and importance. The first general field I shall consider is logic. Here his work is particularly comprehensive, very largely original and for...