
Within the unified time scale and boundary time geometry framework, we provide an axiomatizable characterization of ``what world observers see.'' Starting point: given global boundary algebra and quantum state, all ``world sections'' satisfying field equations and causality form a geometric--measure space; concrete observers access only subfamilies compatible with their worldline, resolution, and records, while ``superposition'' is not simultaneous multiple realization of experiential world but
General Relativity, Modular Flow, Unified Time Scale, Information Theory, Boundary Time Geometry, Wigner-Smith Time Delay, Causal Structure, QNEC, Quantum Scattering, Generalized Entropy, Spectral Shift Function, Time Geometry
General Relativity, Modular Flow, Unified Time Scale, Information Theory, Boundary Time Geometry, Wigner-Smith Time Delay, Causal Structure, QNEC, Quantum Scattering, Generalized Entropy, Spectral Shift Function, Time Geometry
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