If you could build a time machine, would you do it? If you could travel through space and time, would you do it? If you could alter the past, would you do it? If you could go back to that deli you went to for lunch today and not get that turkey club because the meat tasted funny, would you do it? Wouldn’t it just be easier to take some Tums and then remember not to order that sandwich? Doesn’t this seem like a massive waste of money?