Dynamic Harmony Structural Stress-Test Series — Paper 2: Quantum Darwinism and the Emergence of Classicality

Dynamic Harmony Structural Stress-Test Series. This paper evaluates Quantum Darwinism as a proposed mechanism for the emergence of classical structure from quantum systems. The analysis examines whether environment-induced redundancy and decoherence satisfy the structural conditions required for genuine emergence within the Dynamic Harmony framework. Using the Phase Non-Substitutability Test introduced in Paper 0 and the architectural boundary criterion developed in Paper 0B, the paper analyzes whether the proliferation of environmental records constitutes a redefinition of system architecture or remains a configurational rearrangement within the existing quantum state space. The results clarify the relationship between decoherence, environmental encoding, and the structural requirements for Type-2 emergence. This paper forms part of the Dynamic Harmony Structural Stress-Test Series, a research program that evaluates major theories of emergence across physics, biology, and complex systems through adversarial structural analysis.