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