Actually you can't 'time travel'. Time is invarient, so not someplace you can travel to and from. The theory is that one could possibly travel in the multiverse that may take place at a earlier or future period.
As far as going into the future and coming back to the present to help someone 'avert future disaster' is, of course, impossible. The multiverse is affected only at the point we make a decision or action. The multiverse you may have visited in the future might have the same players, but can not be the same multiverse that will be created when the person you intend to help with your information makes his/her decisions. In other words, you can not influence that persons future in his present multiverse and most certainly not the 'future' multiverse you happened to visit. Sorry if this sounds confusing; its kind of a difficult concept to discuss in an LJ post :-)
But at least she had the sense to consider paradoxes
Sorry, she didn't. Paradoxes do NOT exist. Period. Again, space here is a bit limited to discuss this, but if you are really interested I can recommend a couple of good books.
no subject
Actually you can't 'time travel'. Time is invarient, so not someplace you can travel to and from. The theory is that one could possibly travel in the multiverse that may take place at a earlier or future period.
As far as going into the future and coming back to the present to help someone 'avert future disaster' is, of course, impossible. The multiverse is affected only at the point we make a decision or action. The multiverse you may have visited in the future might have the same players, but can not be the same multiverse that will be created when the person you intend to help with your information makes his/her decisions. In other words, you can not influence that persons future in his present multiverse and most certainly not the 'future' multiverse you happened to visit. Sorry if this sounds confusing; its kind of a difficult concept to discuss in an LJ post :-)
But at least she had the sense to consider paradoxes
Sorry, she didn't. Paradoxes do NOT exist. Period. Again, space here is a bit limited to discuss this, but if you are really interested I can recommend a couple of good books.