Aristotle's reliance on dialectic as a method of philosophy appears to conflict with his metaphysical realist view of his conclusions. This book explores Aristotle's philosophical method and the merits of his conclusions, and shows how he defends dialectic against the objection that it cannotjustify a metaphysical realist's claims. The author does not presuppose extensive previous acquaintance with Aristotle. Greek texts are translated, and Greek words transliterated.