Local Expansion, Hidden Overlap, and Global Balance: Toward an Observer-Limited Cosmology

Observer-Limited Cosmology develops a foundations-oriented framework for interpreting cosmological structure under horizon-bounded observational access. The paper distinguishes the observer-accessible cosmological case—defined by the domain of communicable information and high recoverable structure—from the broader continuous cosmological reality to which it belongs. Redshift, flux dilution, and horizon structure are treated as informational filters that progressively reduce recoverable structure with separation, yielding an epistemic horizon marking the limit of reconstructive reach rather than a boundary of physical reality. Within this framework, local asymptotic behavior, including heat-death-like dilution, is shown to be insufficient for inferring global terminality without an added representativeness assumption. The concept of hidden overlap is introduced to denote structural continuity beyond the recoverability horizon without implying measurable coupling, exchange, or multiple cosmological regions. Hidden overlap is therefore interpreted as a reminder that observational boundaries need not coincide with the boundaries of reality itself. The framework preserves standard FLRW dynamics within the observer-accessible domain and introduces no new physical entities, interactions, or laws. It does not deny the validity of local cosmological reconstruction, nor does it challenge the observational successes of contemporary cosmology. Rather, it clarifies the inferential status of claims extending from locally reconstructed histories to assertions about total cosmological reality.