In cybersecurity, you assume breach, you assume there will be vulnerabilities, you assume that through open bug bounties, cyber drills, people working together, responsible disclosure, planning for buffering — the Anthropic idea of buffering for six times more vulnerabilities and so on safety margins. All this is risk management. But nuclear proliferation is a different metaphor. There’s a threshold of uranium concentration below which everybody gets to play, above which nobody gets to play essentially.