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What's the difference?

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All stages · Demo 210

Heat index

Choice porch / field / ed. Heat index is the NWS Rothfusz regression. Jev never multiplies T×RH. Missing humidity cannot index.

ChoiceHeat index in JS

A dial. 80°F / 40% is HI 80. 95°F / 70% lights 123. A dry-bulb with no RH stays blank.

replayset —hi —

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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.