MENTAL MODEL · M2141

Duck Test

SystemsHigh supportSystems Theory

Included

Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

"If it looks like a duck, swims like a duck, and quacks like a duck, then it probably is a duck." -

SCAFFOLDING EFFECT

psychology

Reduce cognitive load

An anti-essentialist identification tool. - Often, we don't need to delve into its "essence" or "internal code." In black-box systems, behavior is identity. If an AI behaves as if it is conscious, do we need to agonize over whether it actually has a soul? For example,

anchor

Anchor fast decisions

The duck test is a heuristic based on externally observable characteristics: when a thing is highly similar to a certain category in multiple independent dimensions, the probability that it belongs to that category is extremely high. It does not rely on internal essence or the internal state of a black box; it only looks at "behavior as identity," making it a practical anti-essentialist identification tool.

MINIMUM ACTION

In progress 0/4

Practice this model in one real situation:

List several key observable features of the target category (e.g., a duck's appearance, swimming style, quack)
Check whether the object matches these features one by one
If most features match simultaneously, make a judgment of "high probability of belonging to that category"
Use this judgment for decision-making, usually without further probing into its internal mechanism.

Check to track your progress (stored locally)

Learning progress0%

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Source support: Explicit

link
en.wikipedia.orghttps://en.wikipedia.org/wiki/Duck_testZH · Explicit
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