Principlev1

Default to three-level hierarchies (root, intermediate,

Default to three-level hierarchies (root, intermediate, leaf); each additional level requires explicit justification for the structural information it preserves.

Why This Is a Principle

Derives from Working Memory Capacity Limit (working memory limits), Exponential Information Decay (information decays), and Hick's Law of Choice Time (Hick-Hyman Law). Each level adds decision time and working memory load. Three levels handle ~1000 items with ~10 choices per level—optimal balance. Principle sets actionable default and burden of proof.

Source Lessons

L-0270

Flat is better than deep when possible

Simpler hierarchies with fewer levels are easier to navigate and maintain.

Connections

Derived From (3)

AxiomWorking Memory Capacity Limit AxiomExponential Information Decay AxiomHick's Law of Choice Time

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