Anne is nice. Anne is quiet. Anne is not round. Anne is young. Dave is blue. Dave is not nice. Dave is smart. Harry is blue. Harry is not furry. Harry is nice. Harry is round. Harry is young. Nice, young people are smart. All smart, blue people are young. If someone is round and not nice then they are blue. If someone is young and smart then they are quiet. If someone is furry and blue then they are smart. If someone is not blue and not round then they are young. If someone is not quiet then they are not round. If someone is furry and not young then they are smart.
Dave is furry.