Critical Thinking: Fallacies and Rhetorical Devices

Fundamentals of Fallacies and Rhetoric

• Argument vs. Rhetoric: An argument attempts to prove a claim using logic and reasoning. Rhetoric attempts to persuade primarily through emotion-laden language without logical support.

• Fallacy: A common, flawed argument that may seem psychologically persuasive but is logically invalid or weak.

• Categories of Fallacies:

  • Irrelevant Premises: Premises have no logical bearing on the truth of the conclusion.

  • Unacceptable Premises: Premises are relevant to the conclusion but are dubious, weak, or insufficient.

Fallacies of Irrelevant Premises

• Genetic Fallacy: Rejecting or accepting a claim solely based on its nonhuman or abstract origin rather than its intrinsic merit.

• Composition: Arguing that what is true of the parts must be true of the whole, or that what is true of a member is true of the entire group.

• Division: Arguing that what is true of the whole must be true of the parts, or that what is true of a group applies to its individual members.

• Appeal to the Person (Ad Hominem): Rejecting a claim by attacking the person making it rather than assessing the claim itself.

  • Personal Attack: Using insults or abusive terms against an individual's character.

  • Circumstantial: Claiming a view is false because it conflicts with a person's circumstances, background, or commitments.

  • Tu Quoque ("You're Another"): Rejecting a claim by accusing the claimant of hypocrisy.

  • Poisoning the Well: Discrediting a person's character or motives in advance so everything they say is dismissed.

• Equivocation: Using a single word or phrase in two different senses within the same argument.

• Appeal to Popularity (Bandwagon): Asserting that a claim must be true simply because a large number of people believe it.

• Appeal to Tradition: Claiming that a proposition is true or acceptable solely because it aligns with a long-standing tradition.

• Appeal to Ignorance: Arguing that a lack of evidence proves a claim is true (because it has not been disproven) or false (because it has not been proven).

  • Burden of Proof: The responsibility to provide evidence, which rests on the party making a positive assertion.

• Appeal to Emotion: Attempting to persuade solely by evoking feelings (e.g., pity, fear, or flattery) rather than offering logical reasons.

  • Appeal to Pity: Invoking compassion or empathy to accept a conclusion.

  • Apple Polishing: Using flattery to win agreement.

  • Scare Tactics: Instilling unwarranted fear to force acceptance.

• Red Herring: Introducing an irrelevant, distracting issue to divert attention from the original argument.

• Straw Man: Oversimplifying, distorting, or exaggerating an opponent's argument to make it easier to attack.

• Two Wrongs Make a Right: Defending a morally wrong action on the grounds that someone else performed a similar wrong action.

Fallacies of Unacceptable Premises

• Begging the Question (Circular Reasoning): Attempting to prove a conclusion by using that same conclusion as a premise.

• False Dilemma: Forcing a choice between two extreme alternatives while ignoring other viable possibilities.

• Decision-Point Fallacy (Line-Drawing Fallacy): Incorrectly assuming that because no precise line or decision point can be drawn in a continuous spectrum, no distinction exists.

• Slippery Slope: Claiming without adequate evidence that taking an initial step will inevitably lead to a chain of disastrous consequences.

• Hasty Generalization: Drawing a broad conclusion about an entire group based on a sample size that is too small or unrepresentative.

Rhetorical Devices

• Innuendo: Suggesting something negative or disparaging about a person or topic without explicitly stating it.

• Euphemisms and Dysphemisms:

  • Euphemism: Mild, positive, or neutral terms used in place of harsh or negative ones.

  • Dysphemism: Negative or offensive terms used to replace neutral or positive ones.

• Stereotyping: Judging an individual based on an unwarranted, overgeneralized assumption about their entire group.

• Ridicule: Mocking, deriding, or using sarcasm to disparage an argument or person without offering counter-evidence.

• Rhetorical Definitions: Using loaded, emotion-charged definitions to bias an audience rather than providing neutral lexical meanings.

Strategies for Handling Ad Hominem Attacks

• Highlight Irrelevance: Call out the fallacy explicitly and demonstrate that personal attacks do not address the central argument.

• Address the Attack: Directly refute the personal claim if motives or background are pertinent to the context.

• Ignore the Attack: Maintain focus on the main issue without engaging with personal insults.

• Acknowledge and Move On: State awareness of the personal remark without wasting time defending against it.

• Counterattack: Attack the opponent in return, though this resorts to fallacious reasoning.