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