Board Thread:Planning/@comment-1743498-20140110005413/@comment-24509294-20140206192803

Pretty much how this works is, for example, your best friend dies, and you go back in time to save him. But when you save him, history is altered so you would have had no reason to go back in time in the first place. That's why you can't travel back in time. Travelling forward, however, is a different story.