We propose a framework for the emergence of classical facts in quantum mechanics based on decoherence, redundant environmental encoding, and stability under open-system dynamics. Rather than introducing a fundamental collapse mechanism, we define classical facts as equivalence classes of states associated with dynamically selected pointer sectors that are decohered, redundantly recorded, and sufficiently stable to function as public macroscopic records. Within this framework, we formulate conditions under which such sectors become effectively classical for local observers, and we argue that classical observer states are necessarily confined to single fact sectors. We then present a conditional representation result: assuming phase invariance, coarse-graining invariance, and compositional consistency of fact weights, the unique natural weighting of such sectors is quadratic in amplitudes, recovering the Born weighting without introducing it as an independent dynamical postulate. The paper does not claim a full solution of the measurement problem. Its aim is narrower and more precise: to provide a unified criterion for when a quantum correlation structure may be regarded as an effective classical fact, and to integrate decoherence, redundant record formation, and Hilbert-space measure constraints into a single conceptual framework.
Jan Lierzer (Sun,) studied this question.