🚀 go-pugleaf

"Duggy" <Paul.Duggan@jcu.edu.au> wrote in message
news:2b2195c5-e847-412b-a17d-ff739cad876c@d4g2000prg.googlegroups.com...
> On Mar 6, 2:34 pm, "Mr.T" <MrT@home> wrote:
> > Surely that's a tautology. But as usual depends on your unstated
> > definitions. Obviously the universes matter comes from the original
point.
> > Equally obviously the original point did not encompass the current size
of
> > the universe. Scientists do accept a singular point every time they
claim a
> > particular age for the universe by working backwards from the current
> > positions at measured/calculated velocities. Something that seems to be
> > widely accepted I might add.
>
> We're sort of saying here's an inflated balloon: where did it begin,
> and one person is saying "it started as a uninflated balloon, the
> whole thing is the origin point" and the other is saying "it started
> here where you blow the air in"
>
> Right?
>
> > And you know exactly how the earths gravity will affect a time machine
that
> > hasn't yet been invented, HOW exactly?
>
> Which is why you have to discuss hypothetical types of time machines.
>
> > Not according to most cosmologists, of course it depends on your
definition
> > of explosion. Size increasing to encompass earths orbit before
subsequently
> > collapsing, is a widely accepted theory.
>
> Would the speed of expansion be a factor?
>
> > Proof will have to wait a while :-)
> > But if you have PROOF to the contrary, by all means let's hear it.
>
> Why wait, can't we initiate something to cause it now?
>
> ===
> = DUG.
> ===

#  I'd claim that "time travel" is impossible - if you regard the whole
universe as a chain of causal consequences, all more-or-less interdependent.
   Hence, it is impossible to detach any Time Traveller, and/or Machine,
from the totality of events.
   The Past is gone, never to return.  The Future doesn't yet exist. Only
the Present has existence, and only Duration is possible - to extend the
Present into the Future.  And even Duration implies changelessness.
   While Doctor Who and similar "time travellers" are pleasant fictions,
that is what they will probably always remain - fiction.  In the movies,
anything is possible.
    To travel backwards in time, you'd have to "rewind" the whole causal
chain, and we'd all go backwards together - not merely one entity.
    "Time Travel" depends on prior philosophical problems being first
resolved, and I doubt you can get past them.
    As to an "exploding universe", and balloon analogy, these tend to suffer
from the same basic flaw.  The Origin of the Universe assumes the Universe
had an Origin - and if so, what was there beforehand?