C.2.5:4.0a - Kind and characteristic boundary
U.LanguageStateClosureDegree is a dependent durable characteristic value under the declared U.LanguageStateSpace / U.CharacteristicSpace boundary, not a root U-kind. Its identity is the closure-degree basis slot and ordinal scale discipline for governed episteme publication positions. Claims about local route commitments, gates, or authority states remain separate from the closure-degree claim. When one matters to the current use, test it against its applicable rule and current case facts.