I read somehwere a similar scenario. The idea of someone shifting back in time to kill his grandfather. Thus he himself would no longer exist since he broke the genetic chain. However, if he ( time traveller ) no longer existed, then he couldnt go back and kill his Grandfather, thus, his Grandfather remains alive.
Kind of fun to drive the logical portion of the mind bananas pondering such concepts.
I also posted a similar concept in another thread. Most scenarios deal with large spans of time, but what if we narrowed the time span down to 5 to 10 minutes?
If I walk to the end of my driveway, stop for a moment, turn around and walk back into my house…what dynamics are involved in meeting myself at the end of the driveway?
If my device is shifting my physical form through time, what exactly would be required of the device? It would be shifting my mass to a previous location in space. Since the Earth has moved from where my departure point is to where my arrival point would be, not only would time be effected, but geographical position would also have to be considered.
Also, at that moment there is two of me. The first me walking to the end of the driveway, and the second me waiting at the end of the driveway to meet myself. Now, if I walk with myself back into the house, the first me is going to use the device to travel back and become the second me. What happens to the second me that watches as the first me travels back in time to meet myself at the end of the driveway? If M(2) stays and sits down on the couch, will I see myself (1) and myself (2) come through the doorway, and then the new M ( 2 ) watches the M ( 1 ) step into the device to meet myself at the end of the driveway. Essentially at that moment in time, there is M-1, M-2, and another M-2. Theoretically, how many M-2’s could end up sitting on the couch?
And, is it really me. The others would be experiencing different thought patterns and have a seperate disposition. Would it be possible for one of the me’s to stub a toe on the doorstep, when the other me’s didnt. If this is possible, then that me, really isnt me. Or, would all the me’s suddenly have stubbed toes?
I also was pondering..if the Universe contains a specific number of particles, and I shift back into time, at that moment my “being” arrives, I have increased the quantity of particules at that exact moment in the Universe. Would this create an imbalance in the equilibrium of the Universe?