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 "one_sheet_set": "single-house mode: every seat read the SAME sheet set, byte for byte, so one key per sheet is the key for every seat and all the seat pairs share a page rather than being two experiments compared by their averages.",
 "why_it_ships": "§10 names the judge-sheet keys in the kit's own contents. Without them the verdict arrays are keyed by LETTER and nothing joins a letter to an arm, so a reader holding every judge's note could not tell which reply it was about (the hostile lens's third must-fix).",
 "the_blind_was_real": "the key is published AFTER the round. No judge ever saw it: the letters were drawn from the registered blind seed, which was stamped in the roster before the first sheet was built."
}