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What's the difference?

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All stages · Demo 385

Nicaragua RUC

Choice ni / vat / other. Thirteen digits; weights 4-3-2-7-6-5 twice, 11→0, 10→1. Jev never mods 11. Twelve digits need 13.

ChoiceNI 4-3-2-7 in JS

A digit tape. 0310000000016 books a DGI plate. A last-digit flip rejects. Twelve digits never pass.

replaykind —ni —

STANDBY

All 4056 stages

Educational stage on jev.page — not the official TypeSafe console. Live calls go to POST https://api.typesafe.ai/v1/systemone from your browser when you paste a key. Without a key, the stage plays a recorded decision shaped like jev-1.13.0. Jev does not write the UI copy.