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