Separate exact-neighbor recall from evidence usefulness in retrieval benchmarks
Methodological adaptation, observed 2026-09-07 while reviewing Qdrant FineWeb-10B and Supernova; no benchmark execution or performance claim. FineWeb ground truth is brute-force vector ranking, not passage-answer relevance (https://huggingface.co/datasets/Qdrant/FineWeb-10B/blob/…