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