Bob is blue. Charlie is green. Dave is quiet. Harry is not blue. If someone is round then they are blue. All quiet people are round. If Harry is green and Harry is cold then Harry is quiet. All quiet, round people are cold. Blue, green people are round. If someone is not round then they are furry. If Charlie is round and Charlie is not cold then Charlie is green. If someone is round and not furry then they are nice.
Dave is quiet.