Cross-Domain Structural Validation of the Paton System

This paper establishes cross-domain structural validation of the Paton System by demonstrating invariant lifecycle behaviour across artificial intelligence systems, fluid dynamics, and healthcare systems. Across all domains, system behaviour follows the same structural sequence: admissibility → observation → continuation → drift → closure. Admissibility functions as the entry condition for valid system states. Observation defines the compression boundary of interpretability. Continuation is governed by admissibility-gated transitions. Drift represents progressive constraint misalignment. Closure occurs when admissibility conditions fail. These behaviours are structurally invariant and independent of domain-specific mechanisms. The results shift the Paton System from example-based validation to structural necessity, positioning it as a pre-theoretical framework underlying scientific modelling and system behaviour.