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