Bob is high. Bob is strong. Charlie is short. Charlie is small. Alan is clever. Dave is poor. Dave is rough. If someone is not big then they are poor. If someone is not sad then they are wealthy. If someone is clever then they are smart. If someone is smart and not bad then they are quiet. If someone is poor and not big then they are dull. All dull people are thin. If someone is short and small then they are bad. If someone is bad and not smart then they are rough. If someone is rough then they are young. If someone is wealthy then they are nice. All nice people are kind. All quiet people are old. 
Bob is not thin.