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MENTAL MODEL · M9868

Return a Plum for a Peach

Return a Plum for a Peach
CultureHigh supportChinese Philosophy
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Updated 2026-08-22

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INTRODUCTION

English translation pending.

CORE DEFINITION

The phrase names the reciprocity norm in its positive form: a gift given is a gift returned, and the exchange builds the relationship rather than settling a debt. The core proposition is that cooperation between people who are not kin is launched by an unpaid first move, and that the person who provides value first is the one who sets the cycle in motion, rather than the one who waits for proof before contributing. The key qualification is that the norm is a currency of trust and not a contract; it breaks when the favour is engineered to be unpayable, which is what distinguishes generosity from manipulation.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

- Throw First: make the small unpaid contribution that starts the cycle instead of waiting. - Return In Kind: answer a received favour with a roughly matched one, and do it promptly. - Keep It Loose: treat the exchange as trust, not as a ledger demanding exact settlement.

anchor

Anchor fast decisions

Reciprocity is a biological and social shortcut for deciding whom to trust without a contract, because a returned favour is evidence that the other party can be relied on. The first move matters because someone must pay the cost before any evidence exists, and the volunteer who pays it creates the obligation that lets the second move happen. Once the loop is running, each returned favour adds a data point to the relationship, and trust accumulates far more cheaply than it would through monitoring or negotiation.

MINIMUM ACTION

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Source support: Explicit

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    zh.wikipedia.orghttps://zh.wikipedia.org/wiki/%E8%AF%97%E7%BB%8FZH · Explicit
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