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