Bob is blue. Bob is cold. Bob is green. Bob is red. Bob is rough. Bob is round. Bob is young. Dave is green. Dave is rough. Dave is round. If someone is blue and green then they are round. If someone is blue and young then they are red. If someone is green then they are blue. All blue, round people are young. If someone is not rough then they are cold. If someone is round and young then they are blue. If Dave is rough then Dave is round. If someone is not round and not rough then they are red.
Bob is blue.