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