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Argument from Inconsistency

Also Known As: argument from contradiction inconsistency attack self-refutation argument
Argumentation Scheme ID: argument_from_inconsistency

Definition

The argument from inconsistency points out that an opponent holds two or more positions that contradict each other, arguing that at least one must be abandoned. This is a powerful dialectical move because logical consistency is a basic requirement of rational discourse. However, it can be misused by manufacturing apparent inconsistencies through decontextualization, equivocation, or comparing positions held at different times under different circumstances.

Examples

You argue that we should reduce government spending, but you also support increasing military budgets. You cannot logically hold both positions: either you believe in fiscal restraint or you do not. Which is it?

You've publicly stated that government should stay out of people's personal lives, yet you support legislation that restricts what adults can do in their own homes. You can't champion personal freedom and back government intrusion at the same time — these positions contradict each other.

Last month you told the team that deadlines are non-negotiable, but this week you extended the deadline for your own project by two weeks. You can't hold others to strict standards while exempting yourself — that's a direct inconsistency in how you apply the rules.

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

    Is a genuine contradiction being identified in someone's position?

    Type: binary
  2. 2

    Are the statements actually inconsistent, or only apparently so?

    Type: binary
  3. 3

    Is the inconsistency being used to discredit the entire position rather than identify which part is wrong?

    Type: binary
  4. 4

    Could the apparent inconsistency be resolved by context or qualification?

    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.