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