This comes from a confusion of definitions. In common language, a berry is something small that you can pick, usually to eat. That biologists studying plants o

This comes from a confusion of definitions. In common language, a berry is something small that you can pick, usually to eat. That biologists studying plants operate with another definition is really a separate concern. It's similar with vegetables and fruit, e.g. a tomato. I imagine most people will group a tomato with vegetables, rather than apples and oranges. One definition makes sense in a food setting, another definition makes sense when you're trying to understand how stuff works.