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