MENTAL MODEL · M2048

Thomas Theorem

CultureHigh supportSociology

Included

Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

"If men define situations as real, they are real in their consequences."

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- The power of rumors: Even if a bank is not bankrupt, if depositors believe it will fail (defined as real), a bank run occurs, and the bank actually fails (consequences are real). Confidence is more important than gold.

anchor

Anchor fast decisions

W.I. Thomas and Dorothy Thomas proposed: "If men define situations as real, they are real in their consequences." Subjective definitions shape objective behavior, and behavior aggregates into real consequences—subjective reality is "cashed out" into objective reality through social interaction. It illustrates that definitions/beliefs themselves are causal variables.

MINIMUM ACTION

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Practice this model in one real situation:

When analyzing social phenomena, do not only look at "objective facts," but also at "what people believe." Identify shared definitions (expectations, rumors, labels) and the behavioral chains they trigger. In management, skillfully use "definitions" to guide positive self-fulfilling prophecies (e.g., expectancy effects)
guard against negative definitions causing panic (e.g., bank runs).

Check to track your progress (stored locally)

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Source support: Explicit

link
zh.wikipedia.orghttps://zh.wikipedia.org/wiki/%E6%89%98%E9%A6%AC%E6%96%AF%E5%AE%9A%E7%90%86ZH · Explicit
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