Gary is high. Gary is huge. Dave is thin. Dave is little. Harry is kind. Fiona is rough. Fiona is poor. If someone is not big then they are rough. If someone is not sad then they are quiet. 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 big then they are dull. If someone is thin and little then they are bad. If someone is bad and not nice then they are poor. All quiet people are smart. 
Gary is not dull.