If there is a barber who only cuts people's hair if they don't their own hair. According to the barber's own rules, can he cut his own hair? The rules state that he can only cut hair if the person doesn't cut their own hair, and the barber is wondering if he can, but the rules also state that the barber can't, because then, he would be cutting his own hair. Does this make sense, and what is your answer? ​