known_biases: Chinese CDC/government were co-investigators and sole gatekeepers of the underlying raw data (never fully shared with the international team), and the report’s probability rankings and framing were negotiated jointly; the WHO Director-General publicly called its dismissal of the lab-leak hypothesis premature, so every finding channelled through this report (national >80,000-sample animal survey, 457 market-animal samples, within-market case/stall maps) moves together with that access-and-selection constraint.