You're right Balaton about the training. After an inter-club competition, the judge said to one entrant, "your pear wine is a touch mousey." Three of us tasted the wine, the maker, myself, and another member who was a qualified wine judge. None of us could find it, but the comp judge said, "put a spot on the palm of your hand and rub your palms together." We did as he asked and there it was, mousey pee. The competition judge must have had a very keen sense of smell, because in the glass not one of us could sniff it.