Mullen effectively combines logic, epistemology, and good old fashioned common sense. The dialogues and examples are telling; the explanations clear and to the point. The book articulates, defends, and exemplifies all the important features of 'hard thinking'. Many texts purport to aid in the teaching of thinking; this one will clearly succeed.

Harvey Siegel, University of Miami

Not only does Mullen's text challenge students to do some hard thinking, but it explains why they should and it shows them how. . . . [T]he text includes strong chapters on both traditional and modern formal logic. As a result, this book should prove suitable for a wide variety of courses.

Bruce Umbaugh, Webster University

Ideally a logic text should encourage not only criticism of thinking, but critical thinking itself. To its great credit, Hard Thinking does both.

Nicholas Rescher