MENTAL MODEL · M5321

Chain of Suspicion

DecidemediumGame Theory

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Updated 2026-08-08

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INTRODUCTION

English translation pending.

CORE DEFINITION

A concept from Liu Cixin's The Three-Body Problem, describing a situation in which two parties cannot determine whether the other is hostile, cannot determine what the other believes about them, and cannot determine what the other believes they believe, and so on without end. Because the recursion never terminates and the cost of being wrong is annihilation, the rational move is to strike first. The chain is a game-theoretic structure rather than a psychological failing: it arises from missing information and the absence of a credible commitment mechanism, and it can be broken by verifiable communication or third-party arbitration.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Verification check: ask whether the other side's intentions can be independently verified before acting on inference. - Regress recognition: notice when you are reasoning about what they think you think, and stop the recursion. - Channel building: invest in a communication or arbitration channel, since it is the only structural exit.

anchor

Anchor fast decisions

Each party's best response depends on what it believes about the other, and that belief depends on what the other believes about it, so no finite reasoning step produces a stable answer. When the downside of a wrong inference is total, the expected cost of waiting exceeds the cost of striking first, and the strategy becomes preemption. Adding a channel that both sides trust collapses the regress, because the beliefs no longer have to be inferred from behavior.

MINIMUM ACTION

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Practice this model in one real situation:

Identify the situations where you cannot verify the other party's intentions. 2. Trace how far the recursive reasoning goes before it becomes unproductive. 3. Assess the cost of a wrong inference relative to the cost of waiting. 4. Build a verification channel or invite third-party arbitration. 5. Prefer verified information over inference when the stakes are high.

Check to track your progress (stored locally)

Learning progress0%

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Source support: Explicit

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en.wikipedia.orghttps://en.wikipedia.org/wiki/Dark_forest_hypothesisZH · Explicit
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