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