Aristotle's Topics is about dialectic, which can be understood as a debate between two people or the inner debate of one thinker with himself. Its purposes range from philosophical training to discovering the first principles of thought. Its arguments concern the four predicables (definition, property, genus and accident). Aristotle explains how these four fit into his ten categories, and in Book 1 begins to outline strategies for debate, such as the definition of ambiguity. Alexander's commentary on Book 1 discusses how to define Aristotelian syllogistic argument, why it stands up...

Theophrastus was Aristotle's pupil and second head of the Peripatetic School. Apart from two botanical works, a collection of character sketches, and several scientific opuscula, his works survive only through quotations and reports in secondary sources. Recently these quotations and reports have been collected and published, thereby making the thought of Theophrastus accessible to a wide audience. The present volume contains seventeen responses to this material. There are chapters dealing with Theophrastus' views on logic, physics, biology, ethics, politics, rhetoric, and music, as well...