Bob is huge. Bob is big. Gary is thin. Gary is short. Fiona is quiet. Anne is rough. Anne is sad. If someone is not high then they are rough. If someone is not bad then they are wealthy. If someone is quiet then they are kind. If someone is kind and not dull then they are smart. If someone is rough and not high then they are poor. If someone is thin and short then they are dull. If someone is dull and not kind then they are sad. All wealthy people are nice. 
Fiona is not smart.