No Single Equation Governs Reality

Physics may be fundamentally patchwork: different effective theories govern different energy scales and regimes, with no deeper unification to collapse them into one master equation. Decades of unification attempts (e.g., string theory’s E8×E8) lack empirical support and require discarding most of their generic predictions to match observations. — If true, science policy should prioritize testable, regime‑bounded models over grand unification, reshaping funding, public expectations, and how we judge 'fundamental' progress.