R4z3rsPar4d0x, on 13 October 2012 - 05:26 AM, said:
Thats a good point, so you wouldnt be able to travel to the year 2040 because it hasnt happened yet. I saw this thing on this show once and this guy said technically If time travel were possible and you made a machine for it, you would only be able to go back in time to the point you actually turned the machine on.
When speaking of time travel it always boggles my mind not to mention the paradoxes you would have to watch out for.
Yeah. There are practically hundreds if not thousands of paradoxes than can happen due to time travel. To try to explain just one paradox:
If you travel back into the past, what if you meet yourself? What would past-you do? What would present-you do? What if past-you decides not to time travel? What happens to present-you? Will you cease to exist? And we've mentioned that technically, the future doesn't exist. So would the future not exist for past-you? Then how would present-you exist? Would present-you simply not exist? Will there be a million present-you's from a million futures? Is the future for past-you the same for present-you? What if you interact? Would this change the future for past-you? Would if change the future for present-you? How would the future change? Would present-you change? What if present-you does cease to exist? How does that effect past-you? Would past-you cease to exist too? Would all of the you's cease to exist from the timeline?
Wow. My brain is trying to escape from my skull.