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