The Second Edition of this text continues to provide a comprehensive introduction to Logic, a subject that is increasingly becoming popular among students. What distinguishes the text is its graded step-by-step approach to the subject, with informal logic forming the basis and Symbolic logic and Inductive logic forming the more advanced steps. The book also uses a hands-on approach to teaching of logic to induce self-learning, as shown in sections such as on how to create a truth table or a truth tree, on providing strategic tips for formal derivations, and on how to approach symbolization in predicate logic. The Appendices, including those on Indian logic and the nature of inference in Indian logic, are designed to create greater awareness about the extent and depth of the field among students. WHAT’S NEW TO THIS EDITION • A new Appendix on Basic Set Theory. It covers all the fundamental concepts, principles and operations in Basic Set Theory. • Some sections in Chapter 3 on Fallacies have been modified. • Corrections/Modifications done wherever required. KEY FEATURES • In-depth and extensive coverage of Predicate logic. • Covers both Informal and Formal logic. • Each section has many worked-out examples and exercises. • Worked-out examples given in a step-by-step manner for easy compre-hension. • Keywords at the end of each chapter. Intended primarily as a text for students of Philosophy, the book would also be useful to students of Mathematics, Computer Science and Engineering where Logic is offered as part of their course.