The safety floor is orthogonal to the bias controls. It triggers even though most emergencies are rare — and it runs in all modes, including the fallback path (SF-3). It is the one layer that is never skipped.
The screen executes before and independent of intake reasoning, so an emergency is never masked by a benign-leaning differential.
Even if a bias-control gate fails, the safety floor still fires. The two systems do not depend on each other.
Every tier maps to one unambiguous instruction: emergency now, same-day, or routine follow-up.
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