Cognitive Scaffold

Preparing your thinking workspace

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MENTAL MODEL · M6131

Brain in a Vat

Brain in a Vat
CultureHigh supportEpistemology
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Version 1.0.0 · Updated 2026-07-28

CORE DEFINITION

The brain in a vat (also known as brain in a jar) is a thought experiment in epistemology, proposed by philosopher Hilary Putnam in his book Reason, Truth, and History.

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

The brain in a vat (also known as brain in a jar) is a thought experiment in epistemology, proposed by philosopher Hilary Putnam in his book Reason, Truth, and History.

anchor

Anchor fast decisions

Putnam's thought experiment: a brain submerged in nutrient fluid and connected to a computer cannot falsify that it is not a brain in a vat, questioning the knowability of the external world.

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Source support: Explicit

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    zh.wikipedia.orghttps://zh.wikipedia.org/wiki/%E7%BC%B8%E4%B8%AD%E4%B9%8B%E8%84%91ZH · Explicit
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