Harry is high. Harry is strong. Charlie is thin. Charlie is little. Alan is quiet. Gary is sad. Gary is poor. If someone is not big then they are sad. If someone is not rough then they are smart. If someone is quiet then they are wealthy. If someone is wealthy and not bad then they are kind. If someone is sad and not big then they are dull. If someone is thin and little then they are bad. If someone is bad and not wealthy then they are poor. All smart people are nice. 
Harry is not dull.