
The thing is that I am having some problems thinking about timetravel (back in time) posible without thinking that our fate is predetermined.. So if we are going to talk about any paradox that is going to happen if I went back and killed my own grandpa, we have to discuss the posibility of a predetermined universe.
Sometimes I think of time like an extra dimention that we are forced to travel forward in. But imagine that this extra dimention really is constant, and not so abstract as many of us think about it.. Like one of our three visual dimentions.
If I where to have four visual dimention when everybody else would have three dimentions as usual. I would only be visual for anyone else if I where at a specific point in this fourth dimention, but if I move forward in this dimention I would dissapere for everybody else because they can't move in this dimention (or their physics aren't allowed to move in this extra dimention). If this extra dimention where time, then I had to move forward in the same rate thru this dimention to be visual to anyone else.. Or if I run forward and waited there, then everyone would see me when they reached me, they would only see me for a split nanosecond because they are forced forward. But in any case, I still exist even if nobody else knows about it.
Here is a example if it is the case that time work as a fourth dimention, and that we all move forward in it:
If I walk from one side of the room to the other side of the room, and that it takes me one minute.. Imagine now that we have someone that can see thru this extra timedimention, and that he would be able to look exactly one minute forward in the timedimention. He would see me at the other side of the room just completed the walk.. If he where to look a half minute forward he would see me halfway across the room, and so on..
So maybe all matter just flows thought the timedimention, and that we have nothing to say about it.. Everything we do is already done in some predetermined time.. Time maybe is exactly like a object we are walking towards, it is there but we just haven't reached it yet..
Does any of this make sense? Or is it to depressing?