In this classic work of philosophy, Brunschvicg carefully examines Aristotle's Metaphysics and argues for the essential role of syllogism in its demonstration. He also explores the nature of deduction, induction, and the principle of non-contradiction, applying insights from modern philosophy to ancient texts. This book is an important contribution to the study of Aristotelian philosophy and logic and remains relevant today. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.