Bob is blue. Bob is furry. Bob is not quiet. Bob is rough. Bob is not smart. Bob is young. Dave is not blue. Dave is furry. Dave is kind. Dave is quiet. Dave is rough. Dave is smart. Dave is young. Erin is furry. Erin is not kind. If Bob is kind and Bob is young then Bob is blue. If something is smart then it is furry.
Dave is not rough.