The Tier-4 Observation Datum as a Universal Knowledge Interface in the Paton System

The Paton System describes a structural architecture in which system existence depends on admissibility conditions prior to dynamics or optimisation. Within this architecture Tier-4 represents the observational datum: the layer where systems become visible, measurable, and interpretable within human knowledge frameworks. This paper clarifies the role of Tier-4 as a universal knowledge interface through which structural information becomes accessible to scientific interpretation. From this position diverse disciplines such as physics, biology, engineering, and artificial intelligence emerge as domain-specific expansions of the same observational layer. The Tier-4 datum therefore functions as a translation interface between structural possibility and formal knowledge.