This new and revised edition explores the relationship between natural language and logic, motivating the student to acquire skills and techniques of formal logic. It includes substantial additions which make the text even more useful to students and instructors alike. Central to these changes is an Appendix, “how to learn logic”, which takes the student through fourteen compact and sharply directed lessons with exercises and answers. Other new material includes a discussion of the truth tree method for both Sentential and Predicate logic, an account of alternative notations, and the provision of answers to selected exercises that figure in the main body of the book.