Building an Argument and More Fallacies

Course: INDP 170
Instructor: Professor Zarit

Agenda

  • Reminders

  • Basics of building an argument

  • More flawed arguments and fallacies

Reminders

  • Quiz - do the readings and study the slides

  • For Monday, read Chapter 4

Discussion on Arguments

  • Previous discussion focused on what constitutes bad arguments.

  • Current question: What makes a good argument?

Rules of Arguments

  • Logical Order: Arguments should present ideas in a coherent, logical sequence to aid understanding.

  • Reliable Premises: Arguments must start from premises that are trustworthy and fact-based.

  • Concrete and Concise: Avoid vague language; arguments should be straightforward and to the point.

Reliable Premises Example

  • Premises:

    • “Anybody could be a zombie.”

    • “Zombies are always looking to eat the brains of the living.”

    • Conclusion: “Therefore, you should always be ready for a zombie attack.”

Being Concrete and Concise

  • Example of Vague Statement:

    • Original: “I seem to have the distinct impression that my canine companion and I are no longer physically located within the geographical confines of the midwestern American state generally known as Kansas.”

    • Shorter Version Needed: Simplifying this phrase for clarity is essential.

Further Examples of Conciseness

  • Another Example of Vague Statement:

    • Original: “At a point in time subsequent to the present point in time, I will once again be in the location where I am presently located.”

    • A concise version would improve clarity.

Picking Up Previous Discussions: Fallacies

  • Fallacies under consideration include:

    • Ad populum

    • Appeal to authority

    • Circular reasoning

    • Complex question

    • Equivocation

    • Straw man

    • Ad hoc

Fallacy 1: Ad Populum

  • Definition:

    • Appeals to the emotions of a crowd rather than rational arguments.

  • Common expressions:

    • “Everybody is doing it.”

    • “Lots of people are saying that this is true.”

Fallacy 2: Appeal to Authority

  • Structure of Argument:

    • “According to person 1, who is an expert on the issue of Y, Y is true.”

    • Conclusion: “Therefore, Y is true.”

  • Example:

    • Richard Dawkins states that evolution is true.

    • Importance: Not just his acclaim; what matters is the evidence supporting evolution.

  • Clarification:

    • Listening to experts is important, but their claims must be supported by evidence.

    • Not all self-proclaimed experts provide valid or substantiated claims.

Fallacy 3: Circular Reasoning

  • Description:

    • An argument that begins and ends at the same point without progression.

  • Example:

    • “You can count on News One for facts because their motto is 'we just give you the facts'.”

  • Additional examples:

    • “This email is legitimate because you can trust this and all further emails from me.”

    • “It is illegal because it is against the law.”

Fallacy 4: Complex Question

  • Definition:

    • A question framed in a way that traps the respondent into agreeing with a presupposed claim.

  • Example Questions:

    • “Are you still as self-centered as you used to be?”

    • “How long had you contemplated this robbery before you carried it out?”

Fallacy 5: Straw Man

  • Definition:

    • Refers to creating a caricatured version of an opposing view to easily attack it.

  • Common Example:

    • Claim that all vegans are opposed to any form of animal captivity, implying they would never own a pet.

  • Dialogue Example:

    • Person A: “We need some non-Christmas songs at the holiday concert.”

    • Person B: “Why do you hate Christmas?”

Fallacy 6: Ad Hoc

  • Definition:

    • An ad hoc fallacy occurs when new, often unsubstantiated reasons are created to explain away a failed argument or outcome.

  • Example Conversations:

    • Student 1: “I really should have gotten an A for the exam.”

    • Student 2: “You got several questions wrong, though.”

    • Student 1: “That must be because the teacher is a jerk.”

    • Psychic example for the ad hoc reasoning illustrating denial of direct evidence for supernatural claims.

Activity Proposal

  • Activity structure:

    • Form groups of 3-5 people.

    • Select one of the discussed fallacies: Ad populum, Appeal to authority, Circular reasoning, Complex question, Straw man, Ad hoc.

    • Choose two fallacies and create unique example scenarios for each selected fallacy.

Grounds vs. Warrants

  • Grounds (Data/Evidence):

    • The specific facts or evidence supporting a claim, which forms the foundation of an argument.

    • Example: “Studies show teeth are 50% whiter after using this product.”

  • Warrant (Bridge/Assumption):

    • The logical or often unstated connection linking the grounds to the claim, explaining why the evidence is relevant.

    • Example: “People want whiter teeth” to support the desire for purchasing the product.

Grounds and Warrant Example (From Purdue)

  • Grounds:

    • “You hear barking and howling in the distance.”

    • “Dogs are animals that bark and howl.”

  • Warrant:

    • The conclusion derived from grounds and warrant is that “There are dogs nearby.”

Sample Question 1

  • Inquiry:

    • “Students who attend class regularly tend to earn higher grades than students who miss class frequently.”

    • Claim: “Colleges should encourage consistent class attendance as a way to improve student academic performance.”

  • Break down the components:

    • Grounds: Regular attendance allows students to hear core explanations, ask questions, and partake in discussions that reinforce course material.

    • Warrant: The implication that engaging with material through attendance correlates with better performance.

    • Conclusion: Consistent attendance leads to improved academic performance.

Sample Question 2

  • Task:

    • Identify the fallacy in the following statement and explain why it is correct:

    • “Everyone I know agrees that this campus policy is fair. It’s widely supported by students, so it clearly works. Therefore, anyone who disagrees is probably overthinking the issue.”

Final Reminders for Monday

  • Upcoming Quiz

  • Reading Assignment: Read Chapter 4 in the specified text (Best book).

  • Next Discussion Topic: Causation vs. causality.