Appendix B: Glossary of Logical Fallacies
The fallacies identified in Appendix A, with the places where each occurs.
Ad Hominem
Attacking the character, motives, or circumstances of a person instead of answering the person’s argument. Latin for “to the man.”
Found at: Chapter 3, p. 44, n. 130 (as tu quoque); Chapter 3, p. 46, n. 133.
Appeal to Antiquity
Treating a belief or group as true or sound because it is old, or as false or unsound because it is new, without other evidence. Also called appeal to tradition.
Found at: Foreword, p. xvi.
Argument from Silence
Concluding that something did not happen or was not believed because a source does not mention it. Silence alone rarely proves anything, since writers leave out many things.
Found at: Chapter 4, p. 67.
Begging the Question
Assuming the very point that is in dispute as one of the reasons for accepting it, so that the argument proves nothing beyond its starting assumption. Also called circular reasoning.
Found at: Chapter 10, p. 154.
False Analogy
Arguing that because two things are alike in some ways, they must be alike in the way that matters to the argument, when the likeness does not hold at that point.
Found at: Chapter 2, p. 22.
Hasty Generalization
Drawing a broad conclusion about a whole group from too few cases, or from cases that do not represent the group.
Found at: Introduction, p. xix; Introduction, p. xix, n. 3; Chapter 7, pp. 98–99, n. 233; Chapter 7, p. 106, n. 248; Chapter 7, p. 113; Chapter 9, p. 148; Chapter 9, p. 150; Chapter 10, p. 165.
Non Sequitur
A conclusion that does not follow from the reasons or evidence given. Latin for “it does not follow.”
Found at: Chapter 1, p. 16; Chapter 1, p. 16, n. 61; Chapter 3, p. 51; Chapter 4, p. 62; Chapter 6, p. 90; Chapter 10, p. 161; Chapter 10, p. 165.
Straw Man
Restating an opponent’s view in a weaker, more extreme, or different form than the opponent actually holds, and then refuting that version instead of the real one.
Found at: Chapter 2, p. 24; Chapter 4, p. 64, n. 171; Chapter 5, pp. 76–77; Chapter 9, p. 141, n. 302; Chapter 10, p. 162; Chapter 10, p. 163.
Tu Quoque
Dismissing a criticism by pointing out that the critic, or the critic’s side, is guilty of the same thing. Whether or not the charge against the critic is true, it does not answer the criticism. Latin for “you too”; a form of ad hominem.
Found at: Chapter 3, p. 44, n. 130; Chapter 5, pp. 76–77.