Boundary as Non-Constitution of Applicability (The Non-Modal Structural System VIII)

This paper fixes boundary as the non-constitution of applicability within a non-modal structural system. Boundary is not treated as a limit, separation, or external condition, nor as a failure or interruption of relation. It does not mark the edge of a domain. Instead, boundary designates the condition under which applicability is not constituted. Applicability is not presupposed as given, nor is it extended, transferred, or preserved across configurations. Where applicability is not constituted, no operation, selection, or determination is defined. This does not indicate absence but fixes a structural condition in which no domain can be established. No subject is introduced. No interpretation is assumed. No transition or mediation is invoked. Boundary is thus fixed as the structural condition under which applicability does not hold.