edb8c37916
A process document carrying an unknown select rule refuses correctly but names no accepted vocabulary; the fieldtest's bare-plateau paste (df_3) hits an opaque wall. The unit test pins the wanted property at the site that builds the prose (select_from): the refusal enumerates argmax, plateau:mean, plateau:worst beside the quoted offending value. No alias-hint sentence — the enumeration alone rescues the paste case and the project's refusal prose stays sparse; the document schema stays strict per #300 F7.