For one semester courses in Introduction to Logic and introductory courses in Critical Thinking. Becoming a Critical Thinker: A Guide for the New Millennium provides a clear and useful set of tools for evaluating the probability of claims presented to students in their daily lives. In this new millennium, as the power and influence of the mass media continues to grow, students need to develop both fundamental critical thinking skills as well as specific skills that focus on the issues and obstacles particular to our times. Thus, much of this text aims at honing skills useful for separating the probable from the improbable in the daily barrage of claims hurled at students from newspapers, magazines, television, movies, radios, CDs, and the Internet.