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