[re-post]
No .. that is NOT what was said. You are being dishonest
.. and is WHY you should read what is said and not stop
at the first word
I did not stop at the first word. It is you who is being
deceitful. I prominently placed "<<snip>>" in my post to
show that I had read and discarded that which followed.
This is the purpose of "<<snip>>" as everyone knows.
A dishonest person (such as you) would not have done this.
Let's see if I can get through to Tom.
Everyone can agree that people have lifetimes.
(Hell, even tires have lifetimes!)
Everyone can also agree that either these lifetimes
are affected by mere coordinate measurements, or
they are not.
That is, can a mere coordinate measurement suddenly
change Tom's age from 20 to 45?
If not, then Tom's age is "immune to" such mere
measurements, which makes his lifetime (or his age
at any moment) intrinsic.
This has nothing to do with _how_ each person may
age due to external (or internal) factors. It
just means that a person's aging is not affected
by mere coordinate measurements, just as a muon's
lifetime is not.
The main points here are that people have lifetimes
that are not affected by or in any way related to
coordinate measurements, but such measurements are
the _only_ things that special relativity have to
"explain" any and all things about people's lifetimes
and clock rates.
SR does not exist until after each frame is given an
array of clocks and rulers, and the former have been
related per Einstein's definition. And this is _all_
that relativity has, a bunch of clocks and rulers.
It uses these clocks and rulers to make coordinate
measurements, after which it claims that these mere
coordinate measurements somehow show clock slowing
of the sort that is important to physics. However,
it is clear that this can only be non-intrinsic
"clock slowing," which means nothing to physics
because it has nothing to do with the actual or
intrinsic or physical slowing of a clock.
Additionally, since SR's full arsenal cannot even
touch intrinsic clock slowing or intrinsic aging,
SR cannot have any explanation for clocks actually
running at different intrinsic rates or for people
aging differently in different frames.
Let me put it this way:
Suppose Tom has triplet brothers named Tom2 and
Tome3. Now suppose Tom2 leaves Tom when they are
both the same age, and heads out (inertially) to
meet Tom3. When Tom2 and Tom3 meet in passing,
they see that they are the same age. Tom3 then
goes on to catch up with Tom, and they see that
they are _not_ the same age.
SR has no physical (or even mathematical) cause
or explanation for this simple difference of
intrinsic ages.
To repeat, all SR has at his disposal are mere
coordinate measurements, but such things have
nothing to do with a person's actual or real
or intrinsic aging.
What can cause people in different frames (as
were the Toms) to age differently?
Here is Tom's full reply (which I had snipped legally,
not dishonestly):
(I had asked Tom: Would you say that both people and
clocks also have intrinsic lifetimes?)
No. In part because there is no reason to apply such
a concept to them, and in part because in practice
external events always destroy people and clocks (they
don't internally self-destruct as muons do).
What about identical triplets who age differently with
no accelerations involved? What "external events" are
involved here? Why would anyone say that intrinsic
lifetimes of people are not involved or that there is
not reason to apply such a concept to them?
There is also the problem that it is not obvious at
precisely what point in time complicated objects like
clocks or humans start to be, and precisely when they
cease to be.
Tom Roberts
Well, we have no such problems in the given triplet case,
do we?
SR is a crock, and cannot explain or even talk about any
physically important phenomena such as people's intrinsic
aging or a clock's intrinsic rate or even a ruler's real
or intrinsic length.
SR is dishonest, claiming to be of value to physics, when
all it has is incorrect coordinate measurements. (They are
incorrect due to intrinsic clock slowing, intrinsic ruler
contraction, and Einstein's asynchronous clocks.)
~RA~