Originally Posted by
Phil Clark
Time travel, particularly stories involving going back in time and changing the past, are a blatant impossibility. Not because time travel isn't possible. Because we don't know what is impossible now that will be possible in the future.
No, the truth of time travel is this... If you could travel backwards in time, and your goal was to kill Hitler before he came to power. Well, that is the blatant impossibility. You see, even though you haven't yet gone back in time in your experience, you have already been back in time, in the time that you were meaning to visit. So you have already been in the past and tried to kill Hitler. The problem is, something kept you from being able to do so. So while you think that you can go back in time and kill Hitler, the truth of the matter is that you have already been there and you failed to kill Hitler, you just haven't yet gotten to the point in your linear experience where you were able to make the attempt. But when you do, you will fail.