Common Knowledge
Version 1.0.0 · Updated 2026-07-30
CORE DEFINITION
“I know” and “common knowledge” are two different things. Common knowledge means: I know, you know, I know that you know, you know that I know that you know... (infinite recursion). Only when this state is reached can group coordination occur. -
SCAFFOLDING EFFECT
Reduce cognitive load
The critical point for consensus formation. - Classic case “The Emperor's New Clothes”: everyone knows the emperor has no clothes (each individual knows), but it is not common knowledge (people don't know whether others know), so no one dares to speak up. Until a child shouts it out, turning “private knowledge” into “common knowledge” instantly, the system collapses. The success of revolutions, crashes, or group buying often depends on whether information breaks through the “common knowledge” threshold.
Anchor fast decisions
Common knowledge = everyone knows, everyone knows everyone knows... infinite recursion. Merely “everyone knows” is insufficient; one must “know that others know” to trigger coordination or collapse.
MINIMUM ACTION
In progress 0/5Practice this model in one real situation:
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Source support: Explicit
- en.wikipedia.orghttps://en.wikipedia.org/wiki/Common_knowledgeverified
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