Exposing Logical Fallacies Part V

Part Five: Exposing Logical Fallacies

Introduction to Logical Fallacies

  • Overview of logical fallacies discussed in previous lectures:
    • Ad Hominem: Attacking the person instead of their argument.
    • Post Hoc Ergo Propter Hoc: Assuming causation from temporal succession (e.g., Event A happens, followed by Event B, therefore A caused B).
    • Red Herring: Diverting attention from the main issue by introducing a related or unrelated topic.
    • Slippery Slope: Asserting that a relatively small first step inevitably leads to a chain of related events culminating in a significant (usually negative) effect.
    • Hasty Generalization: Making a conclusion based on insufficient or unrepresentative evidence.
    • Faulty Analogy: Comparing two things that share superficial similarities but are fundamentally different.
    • Either/Or Fallacy: Presenting only two options or sides when there are more available.
    • Begging the Question (Circular Reasoning): Assuming the conclusion within the premises; e.g., “X is true because X is true.”
    • Strawman Fallacy: Misrepresenting an opponent's argument to make it easier to attack.
    • Bandwagon Fallacy: Following the beliefs or actions of a group due to fear of rejection.
    • Appeal to Belief: Arguing something is true simply because many people believe it.
    • Appeal to Popularity: Asserting something is true because it is widely accepted.

Appeal to Common Practice

  • Definition: This fallacy asserts that because an action is common, it must be correct, justified, or moral.
  • Structure of the Fallacy:
    • If X is a common action, then X is correct or justified.
  • Examples:
    • "Everyone cheats on tests; therefore, it must be okay to cheat."
    • "Since everyone pays women less than men, it is acceptable to do so."
    • "If slavery is common, then it cannot be wrong."
  • Key Point: Just because something is commonly practiced does not equate to its morality or justification.

Appeal to Tradition

  • Definition: This fallacy claims that something must be true or valid simply because it has been believed or practiced for a long time.
  • Structure of the Fallacy:
    • If people have always believed or done X, then X is true.
  • Examples:
    • "Jefferson County has always been dry; it should remain so since it prospered without alcohol."
    • "Spanking worked as a discipline in the past; therefore, it should be re-adopted to reduce violence today."
  • Critique of Tradition:
    • The reliance on tradition as evidence is flawed, as it does not account for changing societal contexts or deeper evidence.
    • Historical misconceptions, like the belief that the Earth was flat, exemplify that beliefs from the past can later be proven false.

Appeal to Authority

  • Definition: This fallacy occurs when something is claimed to be true simply because an authority figure asserts it as such.
  • Structure of the Fallacy:
    • Person A claims B; because Person A is an authority figure, B must be true.
  • Types of Appeal to Authority:
    • False Authority: Citing an authority in a field outside their expertise (e.g., asking a dentist about tobacco's biological effects).
    • Qualified Authority: Citing an authority within their area, but recognizing that even authorities can disagree (e.g., different scientists have varying opinions).
  • Examples:
    • "Since it is illegal for people of different races to marry, it must be morally wrong."
    • "Doctor Smith, a biologist, says X, so X must be true."
    • "The Quran says X, therefore X must be correct."
    • Narrative Relativity: Noting how the same statement could be viewed differently based on one's beliefs about the authority, e.g., the Quran vs. the Bible as holy texts.
    • Statements like "X is true because it’s on the news/textbook" illustrate how the medium of the claim does not validate truth.

Conclusion

  • Summary of distinctions among the appeals discussed:
    • Appeal to Common Practice centers around actions of the majority.
    • Appeal to Tradition is based on historical acceptance.
    • Appeal to Authority hinges on the credibility of the person making the claim.
  • Importance of critically evaluating arguments rather than accepting them at face value based on popularity, tradition, or authority.