Structural Differentiation Cosmology v1.5: Information-Theoretic Structural Dynamics

This work presents an information-theoretic extension of Structural Differentiation Cosmology (SDC v1.5). In this framework, information is not treated as a primitive entity or externally imposed content, but as the readable distinguishability generated by irreversible structural differentiation within a closed universe. Structural gradients give rise to emergent boundaries, and these boundaries organize how information becomes accessible. Structural entropy and structural information are distinguished as different aspects of the same irreversible process, both evolving along a common temporal direction. The framework further demonstrates that effective boundary-like scaling of information naturally emerges from differentiated structure, providing consistency with holographic behavior without assuming fundamental holography. This work proposes a unified perspective in which time, entropy, boundary formation, and information are different manifestations of a single underlying structural process governing a closed universe.