Generalized Universe Holography (GUH): A Working Hypothesis for Emergent Spacetime

This work introduces Generalized Universe Holography (GUH), a working hypothesis proposing that spacetime geometry is not fundamental, but emerges from information encoded on an effective cosmological boundary. GUH generalizes holographic reasoning beyond Anti–de Sitter geometries, aiming to remain compatible with approximately flat and de Sitter–like cosmologies relevant to observational cosmology. The framework is intentionally non-dogmatic and non-microscopic. It does not posit a specific boundary theory or a strict AdS/CFT-type duality. Instead, it treats holography as an effective, information-theoretic constraint applicable at large scales and under statistical coarse-graining. The hypothesis emphasizes falsifiability, identifying potential observational consequences in cosmic microwave background anomalies, gravitational-wave propagation, and global informational constraints on cosmological evolution. GUH is proposed as an open and revisable conceptual framework, intended to guide future theoretical development and empirical investigation rather than to provide a complete theory of quantum gravity.