Years ago we went to the Savoy, a foursome to celebrate sister-in-law's birthday. We had a tasting menu, with the set glass of wine with each course. One was a red Burgundy, but I identified it as Claret, and told the wine waiter. 'Oh, no, Sir, that is definitely the Burgundy', he replied, dismissively. So I got up, walked over to the sideboard, retrieved the bottle, and took it to him. 'That' I said 'is a claret'. 'Indeed it is, Sir,' he said, without missing a beat, 'I shall go and find the Burgundy for you.'