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StaffML is an assessment instrument, not a textbook: recall is a first-class skill and L1/L2 questions are warm-up/screening (paper sec:levels). A flat 'must reason' bar wrongly rejects valid recall items. Grade the floor by Bloom level instead — L1/L2 pass at tp>=1, L3 at tp>=2, L4/L5/L6+ at tp>=3 — so the gate fails only a level/depth MISMATCH (recall masquerading as L5), not recall doing its job. Re-applied to the backfill: 2,700 below-floor (28%, concentrated at L4-L6+), down from a misleading flat 43%.