Dave is blue. Dave is nice. Dave is quiet. Erin is not blue. Erin is cold. Erin is furry. Erin is nice. Erin is quiet. Erin is rough. Erin is young. Harry is cold. Harry is furry. Harry is nice. Harry is quiet. Harry is young. All blue, nice people are furry. If someone is not nice then they are not furry. If someone is not furry then they are cold.
Harry is not nice.