I'm one of the people who wondered what UKgov's new guidelines (5 veg and 2 fruit a day) actually meant. I suspect they might be thinking of sugar content, but in that case beetroot should be in the 2-a-day category which they have confusingly labelled "fruit". Perhaps people don't know what's in their vegetables, and UKgov don't think it's possible to educate the populace.

Is pumpkin a culinary fruit or vegetable? What about chocolate beetroot cake and carrot cake? Do 'fruit' juices include carrot juice, or exclude tomato juice? Salads with a mix (celery, lettuce, tomato, peppers, oranges), ditto curries. I think it would be much easier to drop the term "fruit" from cooking. I have trouble with the trad British gastronomic demarcations, especially as they are a) no longer relevant and b) historically inaccurate.

It's so much easier to know whether an edible piece of a plant contains seeds, or not. Of course cucumber is a fruit - you can see the seeds!