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occupies a precise location of space time, and that the totality of the universe represents only instances of random order - like frames of a moving picture- that can never be reduplicated at any future instant in time. In essence each instant of time dissolves and is replaced by a new one. From the overall perspective time seems just like a movie but in reality it is simply a presumably perpetual status of separate instances. Now, considering that the quantum uncertainty principle suggests that it is impossible to predict exactly what the position and velocity of any particle in the universe is, it would therefor seem equally unfeasible under any circumstance to exactly recreate any random instantaneous existence of the universe. And yet, this is exactly what a time machine would have to do. To move forward and backward in time you would have to be able to position every particle in the entire universe in the exact position it occupied at any previous or future point in time and then be able to predict how far and in which direction each particle would move in the next or previous instant of time. The problem is that Heisenberg's principle of quantum uncertainty, in any physical sense of time travel, precludes any realization of its' possibility.

Thinking of this in more human terms, the atoms which constitute any being are constantly on the move and being exchanged by the billions every day. At any former or future instances in time the exact atoms which define a being in that instant are likely to have being somewhere else. Therefore, the reconstruction of any configuration of atoms in a different instant in time would be impossible, because it would require the same atoms to occupy two or more different positions in the universe at the same instant in time. This notion, would presuppose the existence of multiple universal dimensions, and while some minds can conjure up such, no evidence exists in reality which would support any rational consideration of it.

The question in this debate is whether time travel is theoretically possible, and presumably anything is, but in this case the stipulation confines us to consideration only of theoretical validity within the confines of the principles of quantum mechanics. Given this stipulation, and the forgoing contentions, the answer to this question must be NO.

REFERENECES AND FURTHER READING:

Walter Isaacsin, "Einstein his life and Universe", Simon and Schuster, 2007

Wikepedia, "Grandfather Paradox," Online: http://en.wikipedia.org/wiki/G randfather_paradox
(H.G. Wells), "The Time Machine," Online:http://en.wikipedia.org /wiki/The_Time_Machine

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