Making Up Your Mind is oriented toward the writing of arguments. It gives students techniques that they can use to better understand, organize, and present their own thoughts. The book provides an exceptionally clear statement of what critical thinking adds to the study of logic, along with complete and systematic coverage of all crucial logical operators and major logical relations. It also offers exceptionally clear and informative discussions of the definition of argument, the distinction between induction and deduction, and the role of emotion in argument.

The second half of the book presents an argument outline which students can use to organize virtually any ethical argument. This outline is also used to illustrate the most important informal fallacies and how they can be avoided. In its closing chapters, the book discusses the nature of good evidence and good sources of evidence and their role in argument. Included are discussions of scientific method, the logical form of arguments about causal theories, and arguments from analogy.