Irreversibility as Non-Admissibility of Restoration The Non-Modal Structural System XIII

This paper fixes irreversibility as the non-admissibility of restoration within a non-modal structural system. Irreversibility is not introduced as temporal direction, sequence, or process. It is not defined as change, progression, or causal asymmetry. It does not indicate the impossibility of returning in time. Instead, irreversibility designates a condition in which restoration is not admissible. Retention is not annulled. Configurations are not removed or reversed. However, no restoration is admitted. No return, recovery, or reconstruction is defined. No transition is assumed, and no process is described. Irreversibility does not mark the outcome of a process. It does not indicate a transformation. It fixes a structural condition in which restoration does not hold as admissible. No subject is introduced. No interpretation is assumed. No causality is invoked. This paper fixes irreversibility as the structural condition under which restoration is not admissible.