C.2.3:11 - SoTA-Echoing

Post-2015 practice across formal methods, software architecture, safety engineering, verification, computational science, and typed proof environments converges on one broad lesson: rigor is not binary. It rises through explicit structuring, predicate expression, executable semantics, and machine-checked obligations. C.2.3 adopts that gradient while keeping the characteristic notation-agnostic and transdisciplinary.