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- Xref: sparky sci.physics:12725 sci.astro:8859 sci.philosophy.tech:2954 talk.religion.misc:13863
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- Path: sparky!uunet!caen!U.Chem.LSA.UMich.EDU!hillig
- From: hillig@U.Chem.LSA.UMich.EDU (Kurt Hillig)
- Subject: Re: Fossil Paradox (was: Structure of Time)
- Message-ID: <bRb-12+@engin.umich.edu>
- Date: Wed, 12 Aug 92 12:34:16 EDT
- Organization: Department of Chemistry, University of Michigan, Ann Arbor
- References: <1992Aug11.135716.1@tnclus.tele.nokia.fi> <1992Aug11.235257.21903@nosc.mil> <1992Aug12.091957.14414@vax5.cit.cornell.edu>
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- In article <1992Aug12.091957.14414@vax5.cit.cornell.edu> cpyy@vax5.cit.cornell.edu writes:
- >> It sounds like those questions where one is asked if you could go back and
- >> kill Adolph Hitler even if it would mean your own death, would you do it?
- >> This has always sounded logically impossible to me. If in 1992 I was sent
- >> back to 1930 (or some such year) to hunt down a man named Hitler and I
- >> was successful, but I was killed, then none of the atrocities of WWII would
- >> have happened (in theory). However, when 1992 rolled around I would never
- >> be asked to go back and kill Hitler because he would never have committed
- >> those crimes. So if I WASN'T sent back, then no one would have killed him
- >> and he WOULD have committed the crimes. Aaaugh.....no wonder I majored in
- >> engineering ...the answers were in the back of the book.
- >
- >This is the standard father-son paradox as re-present by Carl Sagan.
- >The junior time-fan imangines himself going back in time and killing
- >his father. No father, no son, no time travel... back to the beginning.
- >
- > [stuff deleted].
- >
- >Jon C. Russo
- >internet : cpyy@vax5.cit.cornell.edu
- >phone : 607.277.3295
-
- Larry Niven (Sci Fi author of some repute) has written an essay on the theory
- and practice of time travel; I believe it's found in his book "Convergent
- Series" (worth picking up for the title story alone, IMHO). Niven's Law
- (paraphrased, as I don't have the book handy):
-
- If "free" time travel into the past is possible (i.e. that which allows for
- direct interaction with past events), then it will never be discovered/invented.
-
- The logic is that if it's possible to meddle with the past, then people
- past, present and/or future _will_ meddle with the past, until they've
- modified it sufficiently that it leads to a future in which time travel
- is never used. At this point, the universe becomes self-consistent.
-
-