Harry is huge. Harry is big. Fiona is short. Fiona is little. Erin is wealthy. Dave is dull. Dave is sad. If someone is not high then they are dull. If someone is not bad then they are quiet. If someone is wealthy then they are nice. If someone is nice and not rough then they are clever. If someone is dull and not high then they are poor. All poor people are thin. If someone is short and little then they are rough. If someone is rough and not nice then they are sad. If someone is sad then they are young. If someone is quiet then they are kind. All kind people are smart. All clever people are experienced. 
Dave is smart.