Bob is big. Bob is blue. Bob is kind. Bob is nice. Bob is rough. Bob is smart. Bob is young. If something is blue then it is young. If something is kind and smart then it is blue. If Bob is young then Bob is blue. Big things are young. Blue things are big. If something is nice and not big then it is rough. If something is smart and not big then it is not young. If something is not nice and not big then it is blue.
Bob is not young.