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Fallacy Fallacy

Also Known As: Argument from Fallacy Argumentum ad Logicam Bad Reasons Fallacy
Formal Fallacy ID: fallacy_fallacy

Definition

The fallacy fallacy (also known as the argument from fallacy) occurs when someone concludes that a claim is false merely because an argument supporting it contains a logical fallacy. While identifying fallacious reasoning is valuable, a bad argument for a true claim does not make the claim false — the conclusion may still be correct, just not for the reasons given. The truth value of a proposition is independent of any particular argument for or against it.

Examples

"You argued that smoking causes cancer by appealing to authority rather than citing the evidence directly. Since that's a fallacy, smoking must not cause cancer."

During a debate, one speaker points out that the other used an emotional appeal to argue that climate change is dangerous. A commenter concludes: 'She used an appeal to emotion, which is a logical fallacy — so climate change must not actually be dangerous.'

A student notices that his opponent in a debate used a slippery slope argument to defend a minimum wage increase. He tells the class: 'That argument was a slippery slope fallacy, so clearly raising the minimum wage has no merit and we should reject the idea entirely.'

Verification Steps
Verification Steps
Binary yes/no questions that an AI must answer to detect a reasoning pattern in a text.
Each of the 452 aspects has verification steps — simple yes/no questions designed to systematically detect whether a pattern appears in a text. For ad hominem: "Does the argument attack a person rather than their claim?" For false dichotomy: "Are only two options presented when more exist?" This ensures consistent, reproducible analysis.

Binary (yes/no) questions an LLM must answer to identify this aspect:

  1. 1

    Has a fallacy or logical error been correctly identified in an argument for a particular claim?

    Type: binary
  2. 2

    Does the response conclude that the claim itself must be false because the argument for it was fallacious?

    Type: binary
  3. 3

    Is the truth of the claim being conflated with the validity of one particular argument for it?

    Type: binary
Deep Dive
The expandable detail section on each aspect page with examples, psychology, and counter-strategies.
The Deep Dive section provides in-depth information about each aspect: a real-world example showing the pattern in action, an explanation of why it works psychologically, practical advice on how to counter it, alternative names, and links to related aspects.

Hierarchical Context