Charlie is blue. Charlie is green. Charlie is not smart. Charlie is white. Charlie is young. Dave is blue. Dave is green. Dave is rough. Dave is smart. Dave is not young. Gary is blue. Gary is green. Gary is quiet. Gary is rough. Gary is not young. All quiet people are blue. If Charlie is blue and Charlie is green then Charlie is young. If someone is young and quiet then they are rough.
Charlie is not rough.