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- Xref: sparky sci.physics:12784 sci.astro:8909 sci.philosophy.tech:2961
- Path: sparky!uunet!sun-barr!ames!purdue!yuma!csn!cherokee!dakota!ken
- From: ken@dakota (Kenny Chaffin)
- Newsgroups: sci.physics,sci.astro,sci.philosophy.tech
- Subject: Re: Fossil Paradox (was: Structure of Time)
- Message-ID: <1992Aug13.160137.1231@advtech.uswest.com>
- Date: 13 Aug 92 16:01:37 GMT
- References: <41256@ogicse.ogi.edu>
- Sender: news@advtech.uswest.com (Radio Free Boulder)
- Organization: U S WEST Advanced Technologies
- Lines: 85
-
- In article <41256@ogicse.ogi.edu> shobaki@gummo.cse.ogi.edu (Khaldoun Shobaki) writes:
- >In article <1992Aug12.164703.4068@wdl.loral.com> mab@wdl39.wdl.loral.com (Mark A Biggar) writes:
- >>In article <1992Aug12.091957.14414@vax5.cit.cornell.edu> cpyy@vax5.cit.cornell.edu writes:
- >>
- >>I've heard this called the "fixed point" theory of why ther are no vistors
- >>from the future. Now all we have to do is show that the sheaf of universes
- >>where noone every get around to inventing time travel is an stable
- >>attractor and we're done.
- >>
- >>--
- >>Mark Biggar
- >>mab@wdl1.wdl.loral.com
- >
- >Well, I'm no physicist, yet....but that is going to be my major, so I
- >am going to take a whack at this one...
- >
- >First a bit of set-up:
- >
- >The situation: -Fred lives in the year 1992 (call this PRESENT #1)
- > -Fred goes into the past of PRESENT #1 and kills his father
- > (call the past of PRESENT #1 PAST #1)
- >
- >What will happen (I think ;-)):
- >
- > At the exact moment when Fred kills his father, he will be,
- > in effect creating a new reality (call the point where his
- > father dies PAST #2, with a corresponding PRESENT #2)
- > So, in PRESENT #2, there is no Fred, or Fred's dad, since
- > Fred's dad is dead in PAST #2. Unfortunately for Fred, he
- > cannot go to PRESENT #2 since he cannot exist there, so Fred
- > can only return to PRESENT #1, or some permutation of PRESENT
- > #1. This would mean that if it IS possible to travel in time,
- > that even if you change a point in your past, that altered
- > past does not take effect for you, since by changing it, you
- > have created a new reality/universe. Now if it you COULD move
- > "up" a time/space permutation that you create...
-
- This may be true, but it might not be either. Perhaps the events are
- changed such that you actually return to PRESENT 1, but there is a slight
- alteration in the events of the past such that Fred was born before his father
- was killed etc. It doesn't have to be all or none, there can be other
- possibilities. I mean what we are talking about is changing the events of the
- past. It seems likely that you couldn't change one thing and leave all the
- rest the same. There would be shifting and changing until things reached
- equilibrum again. This of course assumes that there is only one physical
- reality. If there are multiple realities then your Present 1 and 2 might be
- true, but if that were true we wouldn't actually travel into "our" past or
- future, but into a different version of it.
-
- >
- >I basically have alot of trouble accepting time travel if it has to fit within
- >our current understanding of the Universe. Some of the things that bug me
- >about it are:
- >
- >-If you move anything back in time, then you are in effect creating new matter,
- > and altering the Universe's total matter content...which is currently a no-no
-
- What if the theory requires that masses be exchanged, not simply moved?
- On theory in a recent sf book is that as one person moves into the past someone
- else _must_ move into the future to balance it.
-
- >
- >-Also, the movement of ANYTHING through time will create a paradox, since all
- > matter is in existance somewhere all the time. eg If i went back 2 billion
- > years, the matter in my body may be part of an asteroid, a puddle, and a
- > breeze....
- good point, but as before what if those piece parts must move into
- the future as you move into the past, thus balancing one another.
- >
- >I guess this could all be explained by the infinite reality idea, since any
- >irregular movement between times would just create a new reality with more mass
- >etc....
- >
- >I probably just confused the subject more than I helped anything, but hey,
- >thats my job ;-)
-
- No these are all good points.
- \
- KAC
-
-
- Kenny A. Chaffin {...boulder}!uswat!ken
- U S WEST Advanced Technologies ken@dakota.uswest.com
- 4001 Discovery Drive Boulder, CO 80303 (303) 541-6355
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