Consider the adjacent field of emergency medicine. Gerd Gigerenzer and colleagues (1999, Simple Heuristics That Make Us Smart, Oxford University Press) documented the performance of a 3-question decision tree for cardiac care unit admissions against two alternatives: a 50-variable statistical model and unaided expert physician judgement. The 3-question tree outperformed both. Faster, more accurate, and more transparent. Physicians without it were classifying roughly 90% of patients as requiring CCU admission when approximately 25% actually did. Defensive over-classification, driven by ambiguity. The tree didn't replace physician judgement. It gave judgement a structure to operate within, before the decision was made, not after.