B.5.2:12.1 - Prompt-entry broadening via U.AbductivePrompt
Older wording that makes AnomalyStatement the exclusive entry form is superseded. B.5.2 accepts U.AbductivePrompt, where AnomalyStatement remains one canonical species alongside cue-derived prompt species such as ProblemCuePrompt, OpportunityCuePrompt, and ProbeCuePrompt.