My first reply....
I have read with great interest the writings here, and on other sites regarding John Titor.
I have an open mind, more than that, I have a belief that many things are possible, the building of a time machine, using technology that we are currently only just begining to understand is, in my view probable.
The Paradox issue is one that has always interested me greatly.
I have a couple of thoughts, but I do not have the physics to explain them, but I will try, should you wish to bear with me.
Thought #1
Infinite versions of universes - the multi-verse concept. If this is true, then the sheer scale of the multitudes of univereses (universii ?) is potentially immense, and its something that is so far beyond my immagination, its scary. I simply cannot get my head around the concept. If its true, if this is possible, then I feel that the future that John, or anyone could or would describe is obviously possible, but highly dependent on the outcome of a mulitude of decisions that will be made, by an huge amount of people, and highly based also on possibilities. Maybe in John's future, the events that he describe are possible, but leading to those events, any number of logic gates will need to be closed in certain fashions. Simply his presence in this version of the universe is enough to change events, and warn us against the outcome ?
Thought #2
Singular universe / timeline
History is fluid. But all changes are only visible to people that have actually travelled outside of time. if a traveller travels to (say) 1999, and assasinates a world leader, when they return to the future (assuming a return is possible) the world will be a very different place. if, and to parody the ultimate paradox, the kill their own mother / father, will they instantly cease to exist ? or will that person actually become a different person ?
This whole view confuses me terribly, because the possibilites are endless.
My recurring thought is that if in the future a machine is made that allows a traveller to travel through time, and the very first traveller takes the technology, and integrate it into their past, thus time travel is 'born' earlier than in their history, will they suddenly find that they have a greatly improved version of the machine ? What if they take the machine, and try to integrate the technology into (say) 1960 ? and the technology is used to end the cold war earlier than it did ? What happens to the future ?
Of course the simple answer is that we (you and I) would have a different past, but thats OK, because we would be unaware of the alternate. But would the traveller have both views available to them ?
-----
Paradox's in my view can only be 'allowed' if there are multiverses.
If there is a singular version of the universe only, then does this preclude backwards time travel, due to the paradox issue ? or, is time-travel a one-shot deal ?
I have a lot of thoughts and a lot of questions, whenever I think about the paradox issue