Logic is the backbone of Western civilization, holding its systems of philosophy, science and law. Yet despite logic's widely acknowledged importance, it remains an unbroken seal for many, due to its heavy use of jargon and mathematical symbolism. This book invites you to crack open that seal and acquaint yourself with this central discipline. It follows the historical development of logic, explains the symbols and methods involved and explores the philosophical issues surrounding the topic in an easy-to-follow and friendly manner. It will take you through the influence of logic on scientific method and the various sciences from physics to psychology, and will show you why computers and digital technology are just another case of logic in action. The difficulties and limitations of logical systems will also be exposed, and you will get a taste of contemporary developments in the field. For the philosophy and sciences student, as well as for the general reader, this book is a unique and indispensable introduction to the terms and ideas of logic, without being a textbook that draws on a deep understanding of mathematical methods.