Cognitive Scaffold

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MENTAL MODEL · M2660

Percolation Theory

Percolation Theory
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Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

Describes the process of fluid permeating through a porous medium. When the probability (or density) of connections exceeds a certain critical threshold (Percolation Threshold), tiny local connections suddenly link into a giant network (giant component) covering the whole system, causing a sudden change in system properties (e.g., from insulator to conductor). -

SCAFFOLDING EFFECT

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Reduce cognitive load

The critical point for propagation and explosion. - This explains how rumors, viruses, or innovations 'explode'. When network density is low, propagation is local; once connectivity exceeds the threshold, propagation instantly covers the entire network. For community operations or epidemic prevention, the core is to control this 'connection threshold'.

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Percolation: On a random lattice/network, nodes or edges exist with probability p, and we study when connected clusters form a spanning path across the system; at the critical probability pc (percolation threshold), the system abruptly changes from 'isolated' to 'conducting'.

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Source support: Explicit

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    zh.wikipedia.orghttps://zh.wikipedia.org/wiki/%E6%B8%97%E6%B5%81%E7%90%86%E8%AE%BAZH · Explicit
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