The worst is botany. Botanists use common culinary words to describe almost entirely non-overlapping sets of plants/fruit etc. The "Tomato a fruit?" question is

The worst is botany. Botanists use common culinary words to describe almost entirely non-overlapping sets of plants/fruit etc. The "Tomato a fruit?" question is nothing compared to the "berry" thing. According to the botanical definition cherries, raspberries, strawberries, boysenberries and blackberries are not berries, but bananas, watermelon, avocado and pumpkin are. Nuts are worse. According botanists, peanuts, cashews, macadamias, pistachios, walnuts, almonds, pecans, pine-nuts and Brazil nuts are not nuts. According to most lay-people, though, botanists are nuts.