 Chapters 19 and 20 conclude Part III with an extended treatment of fallacious reasoning in learned contexts as well as in everyday life. Sophisms and fallacies are taxonomized, copiously illustrated, and attributed to specific flaws of intellectual character in those who propagate them. These chapters occupy nearly as many pages as the material on formal reasoning. With updated examples, these chapters could compete with textbooks currently in use in college courses on “informal logic”.