Bob is green. Bob is kind. Bob is quiet. Bob is rough. Bob is smart. Bob is white. Bob is young. Dave is green. Dave is kind. Dave is rough. Dave is smart. Erin is kind. Erin is quiet. Erin is rough. Erin is young. If Dave is green then Dave is white. If someone is rough and quiet then they are young. All white people are young.
Erin is not white.