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NullPointerException

Built at Meta Global AI Developer Hackathon · Oct 26, 2026 · Remote

NullPointerException — Demo video

Gauge turns ordinary video into a physical measurement that can fail. You tap the thing that moves. Gauge tracks it, sets a real-world scale, finds the law behind the motion, then tests that law on a recording it has never seen. AI can describe a video with total confidence and nothing to check it against. Gauge separates seeing from arithmetic: Meta's models see and choose, and code computes. The agent can only report a result by citing a fit that code calculated, and code alone decides pass or fail. From the 1972 Apollo 16 jump salute film, Gauge read the Moon's gravity at 1.71 m/s². The backpack's size is only known to about five percent, so the honest figure is 1.65 ± 0.15. It then froze that law and tested a second jump, which read 1.61, inside the 8% tolerance. A real throw on Earth read 10.3 and broke the law. Time leaves a trace too. Slow a clip tenfold and gravity looks 100 times weaker. If two clips share one gravity, Gauge reports the playback speed, and it read 0.10× on a clip slowed tenfold. It flags a bent clock. It does not prove how the clock was bent, and it has not been tested on AI video.

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