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