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280Bound builds trap-aware, NBME-authentic practice questions that teach the cognitive biases and test-taking strategies that separate a 280 from a 230.
A 67-year-old woman with hypertension and type 2 diabetes presents for follow-up of paroxysmal atrial fibrillation diagnosed 3 weeks ago. She takes lisinopril and metformin. She has no history of stroke, heart failure, or vascular disease. Echocardiogram shows a structurally normal heart with preserved ejection fraction.
Which of the following is the most appropriate management to reduce her risk of stroke?
Why 280Bound
Built differently.
Trap-aware, not just answer-aware
NBME writes questions designed to exploit your blind spots. We reverse-engineer exactly what makes each wrong answer tempting — the anchoring bias, the classic distractor, the framing trick — so you see it coming every time.
Strategy-first explanations
We don't explain why B is correct. We extract the generalizable principle — the mental model that applies to the next 50 questions on this topic. Less memorization. More pattern recognition.
Precision error taxonomy
Your mistakes aren't random — they follow patterns. 280Bound maps every wrong answer to a specific cognitive error type, then builds a targeted correction plan against your exact weaknesses.
NBME-authentic clinical style
Every question is written to the official NBME Item Writing Guide. Real vignette structure. Real lead-in phrasing. The same cognitive loads and clinical register as the actual exam.
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For exam preparation only. Content on 280Bound does not constitute medical advice and should never be used to guide clinical decisions or patient care. Always consult a qualified healthcare professional. Full disclaimer →