C.23:1 - Problem frame
Families of methods compete inside a CG‑Frame. The selector (G.5) must admit, degrade, or abstain per family without universal scores, using typed problem descriptors and auditable evidence. Maturity of a family (its evidence-backed rung for the declared admission use) must be visible to LOG rules yet separate from acceptance thresholds (which live only in AcceptanceClauses, G.4).