Bob is young. Bob is red. Bob is nice. Eric is round. Eric is big. Fred is kind. Harry is young. Harry is rough. Harry is cold. Harry is blue. If someone is round then they are green. If someone is green and round and big then they are young. If someone is young and rough then they are kind. If someone is rough and nice and blue then they are round. If someone is round and young then they are blue.
Eric is not young.