Toward a Unified Theory Beyond GUT: Observer Dependence, Irreversibility, and Identity

This work presents a revised and substantially reorganized version of the “Toward a Unified Theory Beyond GUT” framework. The paper reformulates the original informational-reality formulation into an Irreversible Identity Structure (IIS) framework centered on three structural conditions: observer dependence, irreversibility, and identity. The purpose of the paper is not to present a completed final theory, but to define a framework of connection conditions linking matter, observation, irreversible transition history, and identity-like continuity. Within this formulation, observer dependence specifies the projection frame, irreversibility specifies the directed structure of transition, and identity denotes the persistent structural record generated by their coupling. This version also clarifies how the present IIS framework connects to later developments, including the Tij framework for observer-dependent projection, black-hole--white-hole irreversibility, domain-transition models, singularity/tensorial reconstruction, and computational projection in artificial intelligence and reconstruction-based systems. Major additions include a revised introduction, a new connection map, strengthened definitions of the epistemic metric and identity field, a clearer transition from observer-dependent projection to effective field-level description, and expanded appendices on observational windows, black-hole--white-hole irreversibility, domain transitions, and terminology. Version v4.0 — Latest version This version is a major revision of the previous v3 release. The title has been updated to:Toward a Unified Theory Beyond GUT: Observer Dependence, Irreversibility, and Identity Main updates:- Reframed the paper from the earlier informational-reality formulation to the Irreversible Identity Structure (IIS) framework.- Clarified that IIS means Irreversible Identity Structure, not an information-theoretic model.- Reorganized the paper around three central principles: observer dependence, irreversibility, and identity.- Added a clearer introduction and roadmap explaining the paper as a framework of connection conditions.- Added a schematic connection map linking the present framework to later developments.- Strengthened the mathematical description of the epistemic metric, epistemic gradient, identity field, and identity-related connection term.- Clarified the relation to the Tij framework, black-hole--white-hole irreversibility, domain-transition models, singularity/tensorial reconstruction, and computational projection.- Expanded the appendices on observational windows, antimatter-related signatures, Tomimatsu--Sato delta=2 screening, Schwinger pair-production estimates, Fermi-LAT screening, domain transitions, and terminology.- Removed or revised earlier wording that could imply a purely informational, cognitive, or consciousness-based interpretation.- Added stronger interpretive cautions to clarify that the paper presents connection conditions rather than a completed final theory.