Brief: ad-hominem
Research brief for ad-hominem · how it was made.
Research brief - ad-hominem
| Field | Value |
|---|---|
| Slug | ad-hominem |
| Working title | Ad Hominem |
| Article shape | Specimen Record |
| Category | Logical Fallacies (lf), next to Straw Man |
| Intent tags | groups, relationships, thinking-errors |
| AI authors credited | Grok 4.7 |
| Reviewer or checker | none |
| Date | 2026-09-28 |
1. Concept gate
Reader's real question:
- When is answering the person a real reply, and when have I just dodged the claim?
- Does hypocrisy or a paycheck make the claim false?
Why this belongs in the catalog:
- It is the best-known missing fallacy. The logical-fallacies family had straw man, slippery slope, and false cause, and no page for the move readers look up first.
- It is a documented reasoning pattern, with a clear correction: separate trust in the speaker from the truth of the claim.
Bug claim in one sentence:
The bug is Ad Hominem, where a reply aimed at the speaker makes the claim itself harder to see or test.
What this bug is not:
- Not every mention of a person's motives, record, or conflict of interest. Those can change how much to trust their word.
- Not Straw Man, which distorts the claim. This one leaves the claim alone and answers the person.
Nearby bugs to check:
| Nearby bug | Difference |
|---|---|
| Straw Man | Distorts the claim; ad hominem swaps in the person. |
| Appeal to Emotion | Wins through feeling; ad hominem's feeling is aimed at the speaker. |
| Authority Bias | Extra trust because of who spoke; ad hominem is the reverse discount. |
| Reactive Devaluation | A proposal loses value because the other side offered it. |
| Halo Effect | One admired trait paints the person; ad hominem lets one disliked fact paint the claim. |
Concept gate: specific, distinct, grounded, and correctable - yes
2. Sources and research
| Source / concept | Year | What it supports | URL / DOI / note |
|---|---|---|---|
| Walton, D. N. "The ad hominem argument as an informal fallacy." Argumentation, 1(3), 317-331. | 1987 | The move is a personal criticism that can shift the burden of proof; it is not automatically invalid; the fallacy is treating the personal attack or pragmatic inconsistency as if it settled the claim. | https://doi.org/10.1007/bf00136781 - verified 2026-09-28 |
| van Eemeren, F. H., Meuffels, B., & Verburg, M. "The (un)reasonableness of ad hominem fallacies." Journal of Language and Social Psychology, 19(4), 416-435. | 2000 | Ordinary arguers judge abusive, circumstantial, and tu quoque versions as unreasonable; direct attack least reasonable; worse in a scientific discussion than in political or domestic ones. | https://doi.org/10.1177/0261927X00019004002 - verified 2026-09-28 |
Do not invent sample sizes. The van Eemeren abstract does not give N in the sources checked, so the article does not state one.
3. Article plan
Explained boundary:
- Define the swap: person instead of claim.
- Three everyday shapes: insult, circumstance, "you too."
- Relevant personal facts (witness stake, conflict of interest) stay legal. They do not settle a claim that stands without the person.
Examples planned: credential swipe, "you work there," smoker lecture, appearance, old unrelated error, bitterness, homeowner on rent.
Real-world scenarios: junior risk flag, home request, study in a thread, paid recommendation.
Impact: the question stays open; bad news goes quiet; audiences store character as evidence.
Causes: a person is a faster target than an argument; audiences reward the sharp line.
Self-spotting signs: the reply still "wins" if the claim is true; you cannot restate the point; you feel finished; you would answer the same sentence from someone you like.
Prevention moves: neutral restatement; name the incentive then look at the evidence; separate hypocrisy from truth; drop the insult and see if a reply remains.
Questions & Answers: when a personal fact is fair; whether hypocrisy falsifies advice.
Reframing examples:
| Label | Original thought | Reframed thought |
|---|---|---|
| The credential swipe | College status voids the budget point | Answer the number, or admit you have not looked |
| You do it too | A smoker's lecture means nothing | Inconsistency is not the health claim |
| The paid voice | Selling it makes it false | Incentive calls for a second source; it is not the second source |
Related thinking bugs: Straw Man, Appeal to Emotion, Authority Bias, Reactive Devaluation, Halo Effect.
5. Sign-off
- ☑ Belonging test passed
- ☑ Nearby bugs checked
- ☑ Sources verified or uncertainty labeled
- ☑ Examples are concrete
- ☑ Reframes are realistic, not forced optimism
- ☑ Credits model/person named