# Theoretical Question: If you were to go back into time and change the past, did it still happen?

Posted by: neoryan1

Assuming time travel is possible, of course. Read each side carefully. Requires a LOT of thinking

• No, the past has been altered entirely and no longer exists, therefore what HAD been the past, is now no longer the past

• Yes, although it has been changed and has not happened in our perception of time, at one point it was happening before it had been changed

• Thinking very simply here, whatever happened before you went back and changed the past would only exist as a memory.

• Everything exists

• The only way time travel into the past is possible is with the parallel universe theory. So assuming you traveled into the past to help the Axis win World War 2, you would be living in a parallel universe. There would be the universe you came from where the allies won world war 2. However, you would be in the universe where the axis won world war 2.

• Leaving the parallel universe theory out, you couldn't back in time and changed it because a time paradox would occur. Lets say you went back in time to kill Winston Churchill. Well you couldn't kill him because if he was dead you wouldn't have gone into the past to kill him.

(Maximum 900 words)
triangle.128k says2015-04-29T18:51:27.9212068-05:00
Time travel to the past is not even possible in the first place. Only time travel into the future is possible.
triangle.128k says2015-04-29T18:51:39.8718068-05:00
That is unless you believe in the parallel universe theory.
neoryan1 says2015-04-29T18:51:56.9347077-05:00
I apologize for the No and Yes being switched. This is my first poll.
neoryan1 says2015-04-29T18:53:28.2308068-05:00
That's why I added assuming time travel is possible (Referring to past time travel as well)
Berend says2015-04-29T18:53:53.8958068-05:00
Neither. If you go back, you never changed anything because that is what would have always happened.
neoryan1 says2015-04-29T18:57:30.6164068-05:00
That's what I was trying to explain in the green, Berend.
Mathgeekjoe says2015-04-29T20:30:43.2790855-05:00
What if you didn't change the past but you only fulfilled it for instance if you were to try to change something in the past, the past already had you time travel and attempt that.
TBR says2015-04-29T21:13:04.7830583-05:00
"One of the major problems encountered in time travel is not that of accidentally becoming your own father or mother. There is no problem involved in becoming your own father or mother that a broad-minded and well-adjusted family can't cope with. There is no problem about changing the course of history - the course of history does not change because it all fits together like a jigsaw. All the important changes have happened before the things they were supposed to change and it all sorts itself out in the end. "The major problem is quite simply one of grammar, and the main work to consult in this matter is Dr. Dan Streetmentioner's Time Traveler's Handbook of 1001 Tense Formations." - Douglas Adams.
iQ says2017-08-22T21:18:44.5935078Z
Assuming you are able to 'travel' into the past, nothing you did would lead to a changed future.