Experimental Protocol: Discriminating between 2D–3D relational status Scenarios in TGIU Framework

In the TGIU framework, the 2D informational substrate is conceived as a pre-geometric layer of pure information, where gradients of informational potential (∇Φ) and entropy (∇S) interact to generate the emergent 3D spacetime, matter, and motion. This 2D substrate provides a causal explanation for quantum phenomena that appear “mysterious” in standard physics—such as wave–particle duality, entanglement, superposition, and wavefunction collapse—by treating them as resonance events between 2D and 3D domains. We examine three scenarios of how 2D and 3D may relate: • Separated (Scenario 1): 2D and 3D remain distinct after collapse; interaction occurs only through rare resonances or echoes. • Fish-Bowl Boundary (Scenario 2): 2D acts as a circumferential shell around 3D, producing discrete angular windows of resonance. • Bubble Core (Scenario 3): 2D persists as a central seed within 3D, enabling isotropic and continuous resonance across spacetime. The experimental protocols presented here are designed to discriminate between these three scenarios, using metamaterial mapping, liquid-light experiments, and gravitational-wave residual analysis.