The 14th Edition of Introduction to Logic, written by Copi, Cohen & McMahon, is dedicated to the many thousands of students and their teachers - at hundreds of universities in the United States and around the world - who have used its fundamental methods and techniques of correct reasoning in their everyday lives.   To those who have not previously used or reviewed Introduction to Logic we extend the very warmest welcome.  Please join us and our international family of users!  Let us help you teach students the methods and principles needed in order to distinguish correct from incorrect reasoning.   For, Introduction to Logic is a proven textbook that has been honed through the collaborative efforts of many scholars over the last five decades.  Its scrupulous attention to detail and precision in exposition and explanation is matched by the greatest accuracy in all associated detail.  In addition, it continues to capture student interest through its personalized human setting and current examples. Review "...The readiblity is excellent. The chapter summaries and charts are appropriate and helpful. [Introduction to Logic] delivers a formidable subject in an easy-to-ingest manner.  ...The explanations are easy enough for the novice while rigorous enough to remain a reference work for someone who may occasionally need to return to to a definition of some fallacy or another or needs a quick discussion of asyllogistic inference, for example. ...The text covers Aristotilian and syllogistic logic quite well. ...I think the book's strongest point is the presentation of the informal fallacies. It provides a nice aid for students to sharpen their argumentive skills; even when they may be unfamiliar topics." -- Jason Flato, Georgia Perimeter College "[Of the books pedagogy:] well thought out and organized." -- David Vessey, Grand Valley State University "The strength of the book is that, no matter when a student reads it, it always is sure to have the latest and most pertinent examples..." -- Drew Berkowitz, Bridgewater State College "The explanation of scientific inquiry is particularly lucid and thorough. Compatibility, predictive power, falsifiability, and simplicity are also very well explained. The exercises provided are applicable to real world instances of scientific inquiry." -- William Ferraiolo, San Joaquin Delta College About the Author Irving M. Copi was a philosopher and logician. He taught at the University of Illinois, the United States Air Force Academy, Princeton University, and the Georgetown University Logic Institute, before teaching logic at the University of Michigan, 1958-69, and at the University of Hawaii, 1969-90. His other works include Essentials of Logic, Informal Logic, and Symbolic Logic. Carl Cohen is Professor of Philosophy at the Residential College of the University of Michigan. He has published many essays in moral and political philosophy in philosophical, medical, and legal journals. He has served as a member of the Medical School faculty of the University of Michigan, and as Chairman of the University of Michigan faculty, where he has been an active member of the philosophy faculty since 1955. His other works include The Animal Rights Debate (Rowman and Littlefield, 2001), with Prof. Tom Regan; he is also the author of Democracy (Macmillan, 1972); the author of Four Systems (Random House, 1982); the editor of Communism, Fascism, and Democracy (McGraw Hill, 1997); the co-author (with J. Sterba) of Affirmative Action and Racial Preference (Oxford, 2003) Kenneth D. McMahon studied physics, philosophy, and English Literature as an undergraduate, then took graduate degrees in psychology and philosophy.  He has taught critical thinking, philosophy, statistics, and  psychology, and currently teaches logic for Hawaii Pacific University.  His professional interests include logic, epistemology, philosophy of science, and philosophy of mind, as we