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<div class="moz-cite-prefix">On 05/09/2021 06:32, Adrian Tymes
wrote:<br>
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<div dir="ltr">On Fri, Sep 3, 2021 at 12:09 PM Ben Zaiboc
via extropy-chat <<a
href="mailto:extropy-chat@lists.extropy.org">extropy-chat@lists.extropy.org</a>>
wrote:<br>
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<div>On 03/09/2021 18:11, Adrian Tymes wrote:<br>
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<blockquote type="cite">The matter at hand was the
objection that FTL always causes time travel, which
I believe is not a true claim.</blockquote>
<p>What I was trying to say was, if FTL travel <i>can</i>
result in time-travel, then that means that FTL
travel is not possible (on the premise that
time-travel is not possible), not that it always
does.</p>
<p>Unless, somehow, only non-time-travel-causing FTL
journeys were possible (so your FTL drive
mysteriously stops working when you try certain
trips).</p>
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<div>Alternatively: some proposed forms of FTL could
result in time travel. Those particular forms of FTL
are not possible. This has no effect on other proposed
forms of FTL. This is not dependent on where you go
(that is: not just for certain trips), only how you go.</div>
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<p>I don't understand that. Either you travel faster than light or
you don't. Either FTL travel can result in time-travel or it
can't. If it can't, then surely any method that can transport
things faster than light will work, and if it can, then surely
no method should work?</p>
<p>Saying it's <i>how</i> you get to FTL that matters for whether
time-travel is (theoretically, but not in fact) possible doesn't
make any sense to me, when it's the fact that you <i>are</i>
travelling faster than light that determines if you could
time-travel or not.</p>
<p>But maybe this is just the result of a primate brain evolved to
survive on the savannah trying to think about things far removed
from that environment!<br>
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<p>Ben<br>
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