Codebook v2.0 and frozen hypotheses for coding crew-ground beliefs in Apollo anomaly records

This record freezes a coding protocol and four hypotheses before the coding of three held-out historical episodes. It contains three files. 1. STC_codebook_v2.0.md: rules for coding what the crew and the flight control team stated they believed during Apollo anomalies. Each cell records a content category and an evidence state (held, suspected, repeated, or no evidence) for three fields: the plan, the anomaly class, and the physical cause.2. hypotheses_v2.0_frozen.txt: four hypotheses with pass criteria, an interpretation rule for the agreement and correspondence measures, and a reliability gate (Krippendorff's alpha, lower 95% bound of 0.80).3. freeze_record_v2.0.txt: the date of the freeze and the SHA-256 hashes of files 1 and 2. Held-out episodes: Apollo 11 manual site avoidance, Apollo 13 S-II center engine shutdown, and Apollo 12 pinpoint landing. None had been coded under this codebook when the record was created. Hashes (SHA-256):STC_codebook_v2.0.md 4f2b8856a2d627592849b1ca3b4e0048c4dd179ad38aad9b1e5f6efa7bfd7607hypotheses_v2.0_frozen.txt ace1a574bc83089cc54801fcdff8812e648d2b66c099ec6595ab11ccbfebf4b1