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khanster
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http://en.wikipedia.org/wiki/Kolmogorov's_zero-one_law
It seems that it will never be possible to travel back in time to the past because. we see no tourists from the future.
Likewise it seems that traveling to parallel universes will never be possible due to the fact that we see no tourists from alternate realities.
How can parallel universes be proved to reasonably exist if there is no way to observe them directly?
In probability theory, Kolmogorov's zero-one law, named in honor of Andrey Nikolaevich Kolmogorov, specifies that a certain type of event, called a tail event, will either almost surely happen or almost surely not happen; that is, the probability of such an event occurring is zero or one.
It seems that it will never be possible to travel back in time to the past because. we see no tourists from the future.
Likewise it seems that traveling to parallel universes will never be possible due to the fact that we see no tourists from alternate realities.
How can parallel universes be proved to reasonably exist if there is no way to observe them directly?