Dave is blue. Dave is furry. Dave is quiet. Dave is not round. Harry is quiet. Harry is round. Harry is young. If Dave is young and Dave is cold then Dave is quiet. If someone is not cold then they are young. All blue people are green. If Harry is blue and Harry is green then Harry is young. All furry people are blue. Young, quiet people are furry. If Harry is green and Harry is round then Harry is young. If someone is round and not green then they are furry.
Dave is not cold.