Bob is big. Bob is rough. Bob is young. Dave is blue. Dave is not green. Dave is not nice. Dave is rough. Dave is not round. Harry is big. Harry is young. If someone is not blue then they are nice. If someone is round and young then they are rough. All round, big people are not rough. If someone is nice and round then they are rough. If someone is round and not big then they are rough. All nice people are not green. If Dave is rough then Dave is young. If Dave is big and Dave is not rough then Dave is nice.
Harry is not young.