α⁻¹ is not a coupling: four sectors, one number, one geometry. The fine structure constant (137.036) is not an electromagnetic coupling strength but a structural quantity appearing across four independent measurements.
The paper proposes that the fine structure constant (137.036) is not an electromagnetic coupling strength, but rather a structural quantity appearing across four independent measurements: the cosmological constant, gravitational constant, Hubble expansion rate, and a predicted fifth measurement related to fuzzy dark matter. Three unrelated experimental programmes yield the same value within measurement precision using a pre-determined formula. The work identifies five falsifiable conditions testable with existing instruments, including a pulsar timing array search for a signal oscillating at approximately fifty billionths of a Hertz.