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Argument from Precedent (Argumentation Scheme)

Also Known As: argument from analogy (legal) stare decisis argument case-based reasoning
Argumentation Scheme ID: scheme_from_precedent

Definition

The argument from precedent claims that because a similar case was decided or handled in a particular way previously, the current case should be handled the same way for consistency. This is the foundation of common law legal systems and a general principle of fair treatment. The scheme is defeasible by showing that the cases differ in relevant respects, that the precedent was wrongly decided, or that circumstances have changed enough to warrant a different approach.

Examples

When our competitor launched a similar product last year, we responded with a price match and retained market share. Our new competitor is launching an equivalent product, so we should implement the same price-matching strategy.

A judge notes that in a nearly identical defamation case five years ago, the court ruled in favor of the defendant because the statement was made in a clearly satirical context. Since the current case involves the same type of satirical publication, the judge argues the defendant should prevail here as well.

A parent tells their teenager: 'When your older sister started driving, we set a 10 PM curfew for the first six months. Since the same rule applied to her, it's only fair that we apply the same curfew to you when you start driving.'

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 previous case or rule cited as the basis for a current decision?

    Type: binary
  2. 2

    Is the current case relevantly similar to the precedent?

    Type: binary
  3. 3

    Are there relevant differences that might justify an exception?

    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.