" She’s an expert on the subjunctive, as I think you may know.’ This brought a sharp reaction from Unterholzer. He was the expert on the subjunctive, and it was intolerable that von Igelfeld should go around picking up–for that was what it amounted to–unauthorised experts on the subjunctive, just because they expressed a–misguided–enthusiasm for his work. "

― Alexander McCall Smith , Your Inner Hedgehog (Portuguese Irregular Verbs, #5)