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