William Poland's treatise on formal logic remains one of the most influential works in the field of philosophy. With clear and concise prose, Poland lays out the basic principles of logic and the methods by which we can arrive at true knowledge. This book is essential reading for anyone interested in the foundations of rational thought, and the pursuit of truth and understanding. 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.