There is no such thing as "a location in time". The entire idea of a
"dimension of time" is a mental construct that we hang events that we
experience and learn about in a sequence. SR and GR do not allow for a
unique dimension of time for all observers such that we can say "everything
must be at one and only one position in time and traveling through time at
c in one direction". It only works for pairs of observers that have
identical inertial frames.
Transformations of inertial frames do not generally commute. Any time a
change in the velocity occurs for an observer, its inertial frame is
changes and never again will their clocks completely agree. There may be a
momentary congruence of the numbers/readings of the respective clock, but
the twins will never again have the same biological age.
On Wed, Jan 15, 2014 at 7:02 PM, Edgar L. Owen <edgaro...@att.net> wrote:
> Bravo! Someone actually registered some of my arguments, though I would
> state them slightly differently.
> The argument in question, that everyone except Brent seems to have missed,
> is simple.
> SR requires that everything moves at the speed of light through spacetime.
> This is NOT just "a useful myth", it's a very important fundamental
> principle of reality (I call it the STc Principle).
> This is true of all motions in all frames. It's a universal absolute
> Now the fact that everything continually moves at the speed of light
> through spacetime absolutely requires that everything actually moves and
> continually moves through just TIME at the speed of light in one direction
> in their own frame. This movement requires there to be an arrow of time,
> and this principle is the source of the arrow of time and gives the arrow
> of time a firm physical basis.
> Second, because everything is always moving through time at the speed of
> light everything MUST be at one and only one location in time. That present
> location in time is the present moment, it's a unique privileged moment in
> (This argument demonstrates only there must be a present moment for every
> observer. The other argument Brent references is necessary to demonstrate
> that present moment is universal and common to all observers.) Bravo again
> Brent, for remembering that one too!
> Since by the STc Principle everything must be at one and only one position
> in time and traveling through time at c in one direction, this conclusively
> falsifies block time.
> Thus SR conclusively falsifies block time. QED.
> On Wednesday, January 15, 2014 6:39:48 PM UTC-5, Brent wrote:
>> On 1/15/2014 2:54 PM, Stephen Paul King wrote:
>> Dear Edgar,
>> ï¿½ I will have to agree with LizR here. SR in fact makes the notion of
>> a present moment a nonsensical concept, as SR shows how there does not
>> exist, nay cannot exist any global frame of simultaneity. This prevents the
>> existence, if SR is correct and good evidence tells us that it is, of any
>> thing like a global present moment.
>> ï¿½ "That dog don't hunt!"
>> But notice that Edgar makes two kinds of arguments:
>> First, the local event argument - if two bodies interact it must be at
>> the same moment (he neglects to to mention that it must also be at the same
>> Second, the continuity argument -
>> if two bodies interact at two different events than at any given time
>> between those two events both bodies exist and this means that they are
>> existing in the same moment, even though they are in different places..
>> Curiously, in his online blog about SR he takes the same approach as
>> Lewis Carrol Epstein in his excellent little book "Relativity
>> Visualized".ï¿½ He notes that everything is always traveling at the speed
>> of light.ï¿½ If you're 'standing still' that means you're just traveling in
>> the time direction.ï¿½ So if you move in the space direction you must give
>> up some speed in the time direction.ï¿½ Epstein calls this a useful myth
>> and doesn't misused it.ï¿½ Edgar assumes that 'time direction' is fixed
>> like Newtonian space.
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