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