"Pentcho Valev" wrote in message ps.com...

[snip]

Assume that, instead of the single clock at A, a large number of
clocks start moving, simultaneously, from different points, with speed
v, along various lines: some along a straight line (no acceleration),
others along a polygonal line (multiple instantaneous accelerations),
others along a curve ("continuous" acceleration).

When two such clocks meet

at B, in the stationary system K of A and B,

they will show the same reading, in
accordance with Einstein's text.

But one of the two clocks may have
been inertial all along whereas the inertiality of the other may have
been disrupted many times and even absent in some intervals. And yet
they show the same reading. Therefore, there can be no physical
explanation of the twin paradox. It is not a paradox but, rather, a
genuine contradiction following inevitably from Einstein's false light
postulate.

Or perhaps it shows what a stupid git you are.

Everything is seen from the same inertial frame ("stationary system")
In this frame all the clocks have a the same constant v, so the integral
Dtau = integral { sqrt( 1 - v(t)^2 ) dt }
is the same for all clocks.
In the twin paradox the stay at home twin remains in the inertial frame.
The traveler is the one with the constant velocity.

Dirk Vdm