Informal Logic
Updated 2026-09-10
INTRODUCTION
English translation pending.
CORE DEFINITION
Informal logic studies the reasoning and arguments that actually occur in public discussion and debate, in education and intellectual life, in interpersonal communication, and in real contexts such as law and medicine. Its goal is epistemic improvement through argument. Because real arguments omit premises and rely on context and rhetoric, it uses argument schemes, fallacy taxonomies, and critical questions rather than formal validity alone.
SCAFFOLDING EFFECT
Reduce cognitive load
- Reconstruct arguments: turn everyday speech, with its omitted premises and rhetoric, into standard form. - Check fallacies: test the strength of each premise with argument schemes and their critical questions. - Locate disagreement: separate a dispute into questions of relevance, sufficiency, and acceptability.
Anchor fast decisions
Arguments in real contexts often omit premises, depend on context, and mix in rhetoric, so formal validity cannot be applied directly. Informal logic therefore uses argument schemes, fallacy classifications, and critical questions: everyday discourse is first reconstructed into standard form, and premises are then tested one by one for relevance, sufficiency, and acceptability.
MINIMUM ACTION
In progress 0/1Practice this model in one real situation:
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Source support: Explicit
- plato.stanford.eduhttps://plato.stanford.edu/entries/logic-informal/verified
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