Memory Then Act: A Testable MediumBased Framework for Physics Beyond Passive Geometry (SP3)

AbstractThis paper presents a falsifiability-driven framework for distinguishing geometricspacetime from a physical, memory-bearing medium (SP3). Six observable criteria—persistent spatial memory, path reuse, environment-dependent inertia, elastic responsewithout matter, energy storage in space, and multi-scale structural consistency—define aminimal empirical program. Observational domains including orb dynamics, gravitationalwave memory (LIGO/PTA), and galactic rotation are examined within this framework. Agoverning medium equation is proposed, and explicit testable predictions are outlined. Thecentral question—does space remember and later act—is reformulated as a directexperimental program.