La Profilée (LP) - Necessary Structural Conditions for Identity Under Change

This paper presents La Profilée (LP). LP is described as an organisational ordering principle. It addresses the question under which structural conditions an entity that claims duration can remain identifiable as the same entity while undergoing change. LP does not describe how systems behave in practice. It does not attempt to predict outcomes. It does not provide a model of causation. It does not offer prescriptions for action. Its aim is narrower: it specifies structural conditions that must be present if identity is to be preserved while change occurs. LP applies only to entities that claim duration. Not every configuration falls within this scope. Some configurations are momentary. Some are purely event-based. Some do not claim continuity beyond a single occurrence. LP is not formulated for such cases. The structural insight that led to LP first appeared in the context of modular design architecture. While examining how an object could remain recognisable while allowing exchangeable components, a structural distinction became visible. That distinction is abstracted in this paper and formulated independently of its original design context. The following sections restate the reference definition of LP, clarify its scope, describe its structural roles, and develop clarifications concerning separation, coupling, duration, legibility, and structural time. A dedicated identification protocol is provided to prevent post-hoc assignment of roles. The paper concludes with a structurally bounded invitation to examination and counterexample.