Fallacies
Fallacy Definition: A fallacy is an erroneous argument dependent upon an unsound or illogical
contention.
1. Ad Hominem (Personal Attack)
• Definition: Latin for "to the person," this fallacy occurs when an individual ignores the substance of an
argument and instead attacks the character, motive, or other attributes of the person making the
argument.
• Example: "You can't trust her stance on education policy; she doesn't even have children".
• Why it's Fallacious: The character or personal life of an individual is usually irrelevant to the truth or
validity of their argument.
2. Appeal to Emotions
• Definition: This fallacy occurs when someone manipulates the audience's emotions (pity, fear, pride,
anger, joy) to win an argument, particularly in the absence of factual evidence.
• Example: "You must donate to this charity, or the innocent, starving children will suffer even more".
• Why it's Fallacious: While emotions are valid in human life, they are not a substitute for logic or
evidence, and they often obscure the facts.
3. Bandwagon (Ad Populum)
• Definition: This fallacy argues that a claim is true or right simply because it is popular or because
"everyone" is doing it.
• Example: "Everyone is buying this stock, so it must be a safe investment".
• Why it's Fallacious: Popularity does not guarantee correctness; for centuries, the majority believed the
earth was flat, yet that was untrue.
4. Slippery Slope
• Definition: This fallacy suggests that a relatively small first step will inevitably lead to a chain of related,
negative events, without providing evidence for that chain reaction.
• Example: "If we let students use their phones in class, they will stop paying attention, fail their exams,
and drop out of school".
• Why it's Fallacious: It assumes a worst-case scenario without proving that the intermediate steps will
actually occur.
5. Hasty Generalization
• Definition: A conclusion based on insufficient, biased, or unrepresentative evidence. It is the foundation
of many stereotypes.
• Example: "My uncle smoked for 40 years and is fine, so smoking isn't actually unhealthy".
• Why it's Fallacious: A small sample size or an anecdotal example is not enough to support a broad,
sweeping claim.
6. Straw Man
• Definition: Occurs when someone takes an opponent's argument, distorts or oversimplifies it to a
weakened, "hollow" version, and then attacks that easier argument instead of the real one.
• Example: Person A: "We should put more money into health and education." Person B: "So you're saying
we should leave our country defenseless by cutting military spending?".
• Why it's Fallacious: It misrepresents the opponent's position rather than engaging with the actual, more
complex argument.
7. Questionable Testimony (Inappropriate Appeal to Authority)
• Definition: Relying on the testimony of a person, or a group of people, to support a claim when that
source is not a legitimate expert on the subject, is biased, or is merely popular.
• Example: "This celebrity says this diet pill works, so it must be effective".
• Why it's Fallacious: A person's fame or opinion does not equate to expert knowledge in a specialized
field.
Fallacy
Core Error
Ad Hominem
Attacks the person, not the argument.
Appeal to Emotion
Substitutes feelings for facts.
Bandwagon
Assumes popularity equals truth.
Slippery Slope
Assumes a chain reaction of negative events.
Hasty Generalization
Draws a conclusion from too little evidence.
Straw Man
Misrepresents the argument to make it easier to attack.
Testimony
Relies on unqualified or biased sources.