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