According to this video from SCI CODE’s Coma Niddy (via The Kid Should See This), there is no such thing as vegetables. What we think of as vegetables are really fruits, roots, stems, and leaves.
That said, these formerly-known-as-vegetables are still really good for us and we should eat them.
While my kids will thrilled to learn that they don’t need to eat “vegetables” anymore, I suspect they will be less amused by a plate full of tubers and legumes.