A ten-second diagnostic timeout for high-risk complaints. For each killer: the discriminating feature that gives it away, and the test that catches it — then a guardrail before you discharge. Built to break premature closure.
A cognitive aid for trained clinicians — it lists classic discriminators, not an exhaustive differential, and never replaces history, exam, and judgement. Absence of a red flag does not rule out disease. Verify against your local pathways.