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