The Note and the Symphony - The Experimental Partition

Third instalment of a trilogy on the partitions imposed by physics on reality. The first (God Arrived for Free) examined the spatial partition; the second (The Half-Nobel) the functional one. This paper examines the experimental partition: the electron g-2 test in the Penning trap and the muon g-2 test in the Fermilab storage ring measure the same quantity under opposite conditions. The electron yields agreement with QED at 0.13 ppt. The muon showed tension for twenty years — tension that in 2025-2026 shifted from the measurement to the theory itself: the data-driven and lattice methods disagree at ~3σ. Three independent measurements of α do not converge (up to 5.5σ). The paper presents three falsifiable predictions and documents a partial independent confirmation of the third (arXiv 2502.04508, KM3NeT-IceCube tension at 2.0-3.6σ), predicted in Paper KM3 of 19 May 2026.