This classic text offers a clear and concise introduction to the principles of deductive logic, an essential component of critical thinking and reasoning. Fowler's presentation is highly accessible, making it an ideal resource for students new to the field. Whether you are an undergraduate or graduate student, an educator, or simply someone looking to sharpen your analytical skills, this book is an invaluable guide. 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.