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