Abstract
We evaluated retrieval self-check for retrieval-augmented answering under 9% distractor density. A deterministic paired simulation generated 56 cases and preserved a upper-severity quartile. Mean evidence faithfulness changed from 0.544 to 0.590; the paired difference was +0.046 (95% interval +0.044 to +0.049). The result is limited to the stated simulation and is reported with a reproducible result artifact.
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