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