The Multi-Simulation Thesis (MST v5): A Unified Substrate Architecture for Coherence, Causality, Dark Matter, and Cosmological Rendering Constraints

The Multi-Simulation Thesis (MST v5) proposes that physical law emerges from a finite-information substrate operating through discrete coherence-update cycles rather than from a fundamentally continuous spacetime. Drawing on evidence from quantum information, non-equilibrium physics, dark matter theory, Dirac-fluid transport, and cosmological anomalies, the paper develops a unified substrate architecture governed by the Discrete Substrate Law (DSL), which treats entanglement, decoherence, causality, and large-scale structure as emergent consequences of substrate-level update dynamics. Using a structured evidence-mapping methodology based on twelve documented literature sweeps, MST v5 constructs a four-level “evidence ladder” linking contemporary physics to falsifiable predictions, including bounds on entanglement formation times, coherence-overflow thresholds in driven quantum systems, memory-like correlations in the dark sector, and compression signatures in the cosmic microwave background. The framework is presented with explicit experimental pathways and falsifiability criteria, positioning simulation-style reasoning as a testable approach to fundamental physics rather than a metaphysical hypothesis.