On 11/11/2012 4:45 PM, Russell Standish wrote:
And many good reasons for thinking it is possible in a Multiverse, as
pointed out by David Deutsch. Time travel into the past is simply
equivalent to going somewhere else in the Multiverse, or to use the
Borge Library of Babel analogy, selecting a book from the Library of
Babel.

It doesn't run into the grandfather paradox, because even when you go
back into the past, and kill your grandfather, because multiple
futures really do exist in the multiverse, you will just end up in a
history that never has the past you growing up in it, just the current
you living your life from where you reentered history. Meanwhile, your
childhood will still exist in a history where you failed to kill your
grandfather, or never even made the attempt.

Just because it doesn't produce a contradiction doesn't mean it's nomologically 
possible.

Brent

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