Gary is strong. Gary is big. Charlie is small. Charlie is short. Dave is clever. Harry is rough. Harry is sad. If someone is not huge then they are rough. If someone is not dull then they are wealthy. If someone is clever then they are nice. If someone is nice and not poor then they are kind. If someone is rough and not huge then they are bad. All bad people are thin. If someone is small and short then they are poor. If someone is poor and not nice then they are sad. If someone is sad then they are young. If someone is wealthy then they are quiet. All quiet people are smart. All kind people are old. 
Harry is smart.