Back in March 2023, more than 33,000 people signed an open letter asking AI labs to pause frontier training. Elon signed it. Nothing paused. Today a single essay got the CEOs of both leading labs to accept outside inspectors, in under 12 hours. The 2023 letter failed for a structural reason. It asked every lab to trust that competitors would also stop, with zero way to check. That's a prisoner's dilemma, and everyone defected on schedule. Dario's proposal is built differently. The commitment…