Comprehensive Study Guide on Lesser Informal Fallacies and Fallacies of Meaning

Introduction to Informal Fallacies

• Overview:

  • Informal fallacies often occur when an argument relies on factors other than solid reasons or evidence.

  • Many fallacies are less common or harder to detect than standard structural fallacies, requiring a systematic classification.

  • Primary categories of misguided logical appeals include appeals to force, pity, popularity, and unreliable authority.

Appealing Fallacies

• Appeal to Force (Argumentum ad Baculum):

  • Verbatim Definition: Agreement is secured through threat of punishment/retribution.

  • Mechanism & Characteristics:

    • Attempts to secure agreement through fear of punishment or other use of force.

    • Few people are genuinely persuaded logically by an appeal to force; rather, targets acquiesce because they have no operational choice.

    • When physical or institutional coercion is present, diagnosing the situation as a logical fallacy does not alter the immediate practical threat.

  • Concrete Examples:

    • Mafia Tropes: Tropes in mafia films where figures like "Vinny the Fish" are sent to talk to someone because he is "persuasive."

    • Physical Intimidation: A $6\text{ feet } 5\text{ inches}$, $250\,\text{pound}$ thug cracking his knuckles while suggesting it is in a person's best interest to donate to a local charity.

    • Institutional Authority: Feeling compelled to agree with a boss, a police officer, or anyone willing and able to punish disagreement.

  • Psychological and Societal Implications:

    • In extreme cases, fear can compel individuals so heavily that they become "true believers."

    • Societal instances of mass hysteria driven by force and fear include the Red Scare and the rise of National Socialism in Germany.

    • Sincere adoption of religious beliefs strictly out of fear of divine punishment represents a state where individuals are psychologically removed from rational reasoning.

• Appeal to Pity (Argumentum ad Misericordiam):

  • Verbatim Definition: Agreement is reached due to empathy/sympathy.

  • Characteristics:

    • Rests on the idea that because you feel sorry for someone or some group, you should agree with them.

    • While logically empty, it possesses substantial rhetorical power and works effectively in practice.

  • Concrete Examples:

    • Political Campaigning: John McCain continually mentioning his time as a prisoner of war (POW) while campaigning for president in $2008$. Spending years in a POW camp lacks a direct logical connection to being qualified for the presidency.

    • Academic Appeals: Students presenting hardship arguments to a professor after receiving a bad grade or needing to turn in an assignment late, hoping empathy will lead to agreement.

• Appeal to the People (Argumentum ad Populum):

  • Verbatim Definition: Holding a belief because it is popular or commonly held.

  • Mechanism & Operation:

    • Represents official logical peer pressure; believing something simply because most other people do is non-rational.

    • Operates largely unnoticed because individuals born into a culture or society absorb its beliefs through immersion.

  • Concrete Examples & Remedies:

    • 12 Angry Men: The movie provides a classic depiction of a single person refusing to agree with the group and using reason to sway the other $11$ jurors to change their verdict.

    • Cultural Immersion: Spending a month in a different culture with people who think differently reveals deeply ingrained societal assumptions far more effectively than self-directed introspection.

    • Linguistic Study: Studying another language can reveal assumptions about the world that exist purely as a product of a native tongue.

• Appeal to Unreliable Authority:

  • Verbatim Definition: Belief in area requiring expertise that is based on non-expert testimony.

  • Context:

    • Vast amounts of human knowledge and belief depend on testimony from others, making the discernment of reputable sources (such as evaluating websites on the Internet) essential.

  • Four Factors for Evaluating Authority Reliability:

    1. Legitimate Credentials in the Specific Domain:

       • An expert cannot speak authoritatively outside their specific field.

       • Example: Albert Einstein was a brilliant physicist, but possessed no special credentials regarding morality or religion.

       • Establishment of Credentials: Credentials are established through openness and review, such as university accreditation by outside agencies or blind peer review for scholarly journals. Credentials can also stem from experience (e.g., choosing a surgeon with $15\,\text{years}$ of successful practice over a recent Johns Hopkins medical school graduate).

    2. Absence of Skewed Agendas:

       • A credentialed expert (e.g., a political science or philosophy professor) may unwittingly present information in a biased manner if driven by a strong personal or organizational agenda.

    3. Domain Consensus vs. Controversy:

       • If a topic is actively controversial among experts, appeals to authority lose evidential force.

       • Historical Debate: Historians debating the underlying causes of the Great Depression or the French Revolution.

       • Physics Example: Einstein rejected quantum mechanics, despite it becoming one of the most firmly established and accurate aspects of modern science.

       • Modern Expert Debate: Considerations surrounding expert agreement on climate change or vaccine safety.

    4. Corroboration:

       • When an authority makes a standalone claim that cannot be tested or confirmed by independent sources, it loses credibility.

• Appealing Fallacies Summary:     

  

Fallacies of Meaning

• Overview:

  • Logical errors that occur due to semantic variations, improper context shifts, or unclear term boundaries.

• Ambiguity and Equivocation:

  • Ambiguity Verbatim Definition: Word has multiple operative meanings in an argument.

    • Ambiguity itself is not inherently problematic; issues arise when context fails to determine which meaning is active or when context shifts the meaning.

  • Equivocation Verbatim Definition: Argument that trades on ambiguity or amphiboly.

  • Exhaustive Case Study: The Abortion Argument:

    • Argument: "Of course fetuses are human beings. What do you think they are, cows? They have unique human DNA. There is no doubt that they are fully human. But anything that is fully human deserves equal treatment with other humans. We all agree that we have the right to life, so we must conclude that fetuses do as well."

    • Analysis: Equivocates on two senses of the word "human":

      1. Biological Sense: Belonging to the biological species with human DNA.

      2. Moral Sense: Belonging to the moral category deserving full rights.

    • Analogy: Saying "Stalin was such a brutal man that he wasn't even human" functions as a moral claim, not a biological one.

    • Univocal Testing:

      • If "human" is read univocally in the biological sense: It is false that all biologically human items deserve full moral consideration (e.g., toenails, tumors, and cancer cells are biologically human, but a pedicure or chemotherapy is not murder).

      • If "human" is read univocally in the moral sense: It is not established that embryos or fetuses are fully morally human, as they lack characteristics valued in humanity (such as rational thought, personality, and autonomous decision making).

    • Conclusion: The argument only appears strong by trading on the shift between biological and moral definitions.

• Amphiboly:

  • Verbatim Definition: Phrase has multiple operative meanings in an argument.

  • Grammatical Examples (Fictional Recommendation Letters):

    • "You'll be lucky indeed if you can get Bob to work for you."

    • "I have never seen anyone work like Bob."

    • "I can't say enough good things about the work Bob does."

• Context Sensitivity:

  • Verbatim Definition: Criteria for applying term shifts with context.

  • Operation:

    • Humor, sarcasm, and everyday statements rely heavily on shifting contextual baselines.

  • Concrete Examples:

    • Classroom Jokester: When a professor enters a sparsely populated room and asks "Where is everybody?", a jokester responds: "One billion people are in China, another billion in India, $300\,\text{million}$ live in the U.S. and the rest are scattered around Europe, South America, Africa and the Pacific Rim."

    • Population Baselines: "Those kids are so big" or "That turtle is fast" (evaluating speed or size relative to species/age groups).

    • Location Baselines: "There isn't any beer" (interpreted specifically within the context of a refrigerator).

    • Comparative Standards: "The road is smooth" (smooth for driving, but rough if evaluated as a tabletop surface); a warm day in January in Anchorage would be considered extremely cold in Florida at any time of year.

• Missing Quantifiers:

  • Verbatim Definition: Statements about populations that do not specify relevant segment of population.

  • Impact:

    • Failing to specify quantifiers like "all", "most", or "some" makes statements appear stronger than they are and directly fuels straw man arguments.

  • Concrete Examples:

    • General Population Statements: "Americans support a woman's right to choice" vs. "Americans want Roe v. Wade overturned." (Evaluations depend on whether the quantifier is all, most, or some).

    • Straw Man Example: "Democrats don't care about reducing the deficit. They increase spending and start new programs that we can't afford. For fiscal responsibility, you have to vote for the Republicans."

    • Analysis of Quantifiers: The claim is false for all Democrats (fiscally conservative Democrats exist) and unlikely for most Democrats (given election focus on the deficit), but accurate for some Democrats (and equally true for some Republicans).

• Vagueness:

  • Verbatim Definition: A term with unclear boundary conditions for its application.

  • Characteristics:

    • Centers on the imprecision of language, specifically where terms apply to qualities that exist as a matter of degree.

  • Comparison:

    • "The room is $67\,\text{degrees F}$" is precisely true or false.

    • "The room is warm" suffers from vagueness.

  • Continuum Scenario:

    • If a room rises from $38\,\text{degrees}$ to $85\,\text{degrees}$:

    • $38\,\text{degrees}$ is clearly not warm, and $85\,\text{degrees}$ is clearly warm.

    • While an observer feels the warming trend continuously, it is impossible to specify the exact degree threshold where the room transitions from "not warm" to "warm" because "warm" lacks precise boundary conditions.

• Fallacies of Meaning Summary: