UX//Cognitive / Principle
Postel’s
Law/FX/
/_
.UX/Pr


UX//Cognitive / Principle
Postel’s
Law/FX//
.UX/Pr

Postel’s Law FX//

Postel’s Law FX//

Postel’s Law FX//

Postel’s
Law/FX/
Accept diverse inputs while producing consistent outputs.

Postel’s
Law/FX/
Accept diverse inputs while producing consistent outputs.

HOW IT WORKS: Systems tolerate variation and ambiguity in inputs but enforce stable output formats.


IN UX/UI/AI DESIGN: AI systems accept informal prompts while returning structured and reliable results.


EXAMPLE: Messy user prompts still generate clean, formatted AI summaries.

Postel’s
Law/FX
Origin

Origin
of The
Postel’s
Law FX

Postel’s
Law/FX

Origin

Jon Postel formulated robustness principles for early Internet communication protocols.

Jon Postel formulated robustness principles for early Internet communication protocols.

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