Lively, comprehensive, and contemporary, covers three principal areas: thought and language, systematic reasoning, and modes of proof. It employs highly accessible explanations and a multitude of examples drawn from social issues and various academic fields, showing students and other readers how to construct and criticize arguments using the techniques of sound reasoning. examines the traditional elements of the field and also explores new ground. The first section of the book elucidates the relationship between thought and language, explaining how words function. It discusses meaning, connotation, vagueness, ambiguity, and definition, identifying the linguistic elements that can produce mistakes in thinking. The next section describes the rules of systematic reasoning, examining such topics as truth, relevance, and adequacy; deductive logic (categorical, hypothetical, and disjunctive); and induction (cause and effect, analogy, generalization, and hypothesis). Sixteen fallacies in thinking are also described through extensive illustrations and applications. The final section of the book offers a unique study of what constitutes proof in several different areas—including politics, advertising, law, and social issues—as well as in the academic disciplines of literature, science, history, and ethics. The author describes the various rules of evidence, using essays by major figures in each field as examples. An ideal text for courses in critical thinking, informal logic, and reasoning and writing, offers numerous pedagogical features including a host of examples; assignments, exercises, and puzzles at both the halfway point and at the end of each chapter; cartoons and quotations throughout; and practical applications of theoretical concepts. An extensive Instructor's Manual contains answers to the exercises that appear throughout the text.