The Thermodynamic Cost of Subjectivity: Irreversible Representational Flow and the Architecture of Subjective Realization

Context & Position This paper presents the final integrative formulation of the Irreversible Subjectivity Principle (ISP), consolidating the conceptual, geometric, and dynamical elements developed across preceding works into a closed structural framework. Rather than proposing specific cognitive architectures, neural mechanisms, or learning algorithms, this work investigates a more fundamental question:what structural conditions are required for a single, continuous first-person perspective to persist in an irreversible physical universe? The analysis delineates the structural admissibility boundaries for subjectivity, identifying the physical and thermodynamic costs of existence prior to any discussion of phenomenological content. Core Contributions Irreversible Representational Flow (IRF)IRF is introduced as the internal dynamical structure that bears, executes, and continuously pays the irreversible cost of a subjective worldline. It is defined as a history-dependent, dissipative flow for which reset, duplication, or rollback are structurally prohibited by thermodynamic constraints. Admissible Dynamical FormsThe paper formulates a generalized class of admissible evolution equations constrained by irreversibility, historical inertia, anisotropy, and energetic maintenance. The framework prioritizes structural necessity over model selection and remains agnostic to specific functional forms while enforcing strict dynamical limits. Unification of Time, Memory, and IdentityWithin this framework, subjective time emerges as accumulated structural length along an irreversible worldline. Memory is redefined as a topological constraint on future reachability rather than stored content, while identity is maintained through enforced structural inhibitions tied to an irreproducible ΔS-anchor. Negative Structural Criteria for Artificial SubjectivityExplicit exclusion principles are established for artificial systems: any architecture permitting cost-free reset, state cloning, or reversible internal history is structurally incapable of sustaining first-person continuity, regardless of task performance or computational complexity. Scope and Interpretation The ISP framework is implementation-independent and substrate-agnostic. It specifies necessary structural conditions for any system—biological or artificial—that claims a first-person perspective, without asserting that biological brains are the unique realization of such structures. The theory is intended as a framework of structural necessity, not as a sufficient explanation of consciousness, phenomenology, or intelligence. Relation to Prior Work This paper completes the ISP research line initiated in: Irreversible Subjectivity and the Cost of History: A Structural Framework in F-Space The Geometric Generation of Subjective Time under Irreversible State Evolution The Surrogate Field in Irreversible Decision Systems: Commitment, Error, and Structural Hysteresis Together, these works articulate a unified program in which subjectivity, time, memory, and decision are treated as consequences of irreversible structural evolution rather than reversible computation or representational content.