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A theory proposing that in practice—outside textbooks—logic, reason, and rationality vary significantly between individuals. It argues that what counts as a “logical” move is shaped by personal history, cultural background, social position, emotional state, and immediate context. No universal logical rule, not even the law of non‑contradiction, operates identically across all people in all situations. Instead, individuals develop situated rationalities: they may accept paradoxes in love, reject valid syllogisms from disliked sources, or prioritize coherence over consistency. The theory does not claim that logic is arbitrary, but that its real‑world functioning is always mediated by the person doing the reasoning, making interpersonal logic as much a study of people as of propositions.
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