MENTAL MODEL · M3875

Ship of Theseus Paradox

BusinessHigh supportManagement

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Updated 2026-08-05

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INTRODUCTION

English translation pending.

CORE DEFINITION

A thought experiment recorded by Plutarch, asking whether a ship remains the same once all its components have been replaced one by one. It exposes a conflict between two criteria of identity: material composition and persistent form or function. The paradox bites because each criterion is reasonable on its own and the two diverge under gradual change.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Identity reframe: Define an organization by its pattern of information flow rather than by its current members. - Change tolerance: Allow parts to be replaced without treating that as a loss of identity. - Criterion check: State which test of sameness you are using before arguing about whether something survived.

anchor

Anchor fast decisions

Gradual replacement makes each step too small to flip any verdict, while the cumulative result is a complete change of parts. A criterion based on material continuity gives one answer and a criterion based on form gives another, and nothing in the sequence selects between them. The paradox therefore reveals that identity claims depend on a criterion chosen in advance.

MINIMUM ACTION

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Practice this model in one real situation:

Name the thing whose identity is in question. 2. Write down the criterion you are using: parts, pattern, function, or continuity. 3. Apply it at the start and at the end of the change. 4. Note where the two criteria disagree. 5. Pick the criterion that matches the decision you actually need to make.

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/Ship_of_TheseusZH · Explicit
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