Fiona is huge. Fiona is strong. Harry is thin. Harry is short. Alan is quiet. Erin is dull. Erin is rough. If someone is not high then they are dull. If someone is not bad then they are kind. If someone is quiet then they are wealthy. If someone is wealthy and not sad then they are nice. If someone is dull and not high then they are poor. If someone is thin and short then they are sad. If someone is sad and not wealthy then they are rough. All kind people are smart. 
Erin is smart.