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