Representational Differentiation from Coordinate Pressure

This paper develops the consequences of coordinate pressure for the structure of admissible descriptions. It shows that representational differentiation—the emergence of distinct descriptive roles or components—is not an added assumption, but a structural response to admissibility constraints acting on coordinate choice. By analyzing how descriptions must adapt to preserve standing under redescription, the paper demonstrates that coordinate pressure induces differentiation as a stabilizing outcome. Descriptions that fail to differentiate appropriately collapse into degeneracy or ambiguity, while differentiated representations remain coherent and reference-preserving. The argument is structural and independent of specific models, dynamics, or empirical inputs. It does not assert that any particular differentiation scheme is uniquely required, nor does it claim that all admissible descriptions must converge to a single form. Instead, it isolates a local boundary result: admissibility-induced coordinate pressure necessitates some degree of representational differentiation to maintain standing. This result explains why differentiated descriptive structures recur across successful theories without treating those structures as fundamental or ontically primitive.