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Proportionality Bias

Also Known As: Major Event / Major Cause Heuristic
Discourse Mechanics ID: proportionality_bias

Definition

The tendency to assume that big events must have big causes. People find it psychologically unsatisfying when a major outcome is attributed to a minor, mundane, or random cause, leading them to prefer grand explanatory narratives.

Examples

Conspiracy theories about the assassination of a major political figure: 'Someone that important couldn't have been killed by a lone, insignificant person.'

When a massive financial crash occurs due to a series of small, compounding bureaucratic oversights, the public rejects this explanation and insists a powerful secret group must have orchestrated it deliberately.

After a popular celebrity suddenly dies of a common cardiac event, thousands of social media users insist there must be a cover-up, finding it impossible to accept that someone so famous could be brought down by an ordinary health failure.

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 significant or large-scale event or outcome being evaluated?

    Type: binary
  2. 2

    Is there an assumption that the cause must be equally large or significant?

    Type: binary
  3. 3

    Are small or mundane causal explanations being rejected in favor of grand ones without evidence?

    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