posted on Sep, 23 2004 @ 02:49 PM
Just by going back into the past you might have changed or altered something in the future. So there really is no way to tell the future with a
complete accuracy. Provided you a time traveler of course. Also, the only way to prove you are from the future is to have technology way out of this
time, videos, and stuff like that, but it could be a human from an advanced planet screwing with you.