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