Abstract
We evaluated retrieval self-check for retrieval-augmented answering under 8% distractor density. A deterministic paired simulation generated 72 cases and preserved a rare-condition slice. Mean evidence faithfulness changed from 0.539 to 0.588; the paired difference was +0.049 (95% interval +0.046 to +0.051). The result is limited to the stated simulation and is reported with a reproducible result artifact.
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