A camera called a shiny bald head the ball. 98% sure. Physics overruled it and kept the real ball. It really happened. October 2020, an automated camera followed a linesman's bald head for a whole match (Inverness Caledonian Thistle, 2020). A detector only sees one frame at a time. Under floodlights a bald head shines like a ball, scores higher, and the camera chases it. Plumbline sits after your detector and asks one thing: could a real ball actually be there, moving like that, at that size? A head standing still at head height can't be, so it gets rejected no matter how confident the box. In the reel: same footage, two trackers. The old one swings to the head. Ours holds the ball, on real match footage, not just a clean simulation. Every call carries its reason on file. Physics overrules pixels. 🎥 Send this to the engineer who still trusts the highest-confidence box. #ComputerVision #SportsTech #ObjectDetection #MachineVision #BroadcastTech