Constraint-Incompatibility as a Collapse Criterion in Structural Realism - CICL

Structural realism explains persistence of relational structure across transitions but lacks a domain-neutral account of why systems cease to persist. This paper introduces the Constraint-Incompatibility Collapse Law (CICL), a structural principle stating that identity fails whenever a system exits its admissible constraint region without an admissible recovery path. Collapse is thus explained as incompatibility-conditioned termination rather than spontaneous failure. A formal lemma, boundary analysis, implications, objections, and falsifiability condition are provided. Together with the Constraint-Compatibility Persistence Law (CCSL), this yields a unified structural account of persistence and collapse across domains.