http://www.pitt.edu/~jdnorton/teachi...ity/index.html
"How can I find out what the moving clock reads an hour from now when it is no longer anywhere near me? Here's one procedu an observer sets up many clocks at rest with respect to a long platform that extends throughout space. Then, while a moving clock passes each one of those clocks, a friend notes what the moving clock reads and what the local resting clock reads; and so on for each of the clocks passed. From the friends' reports, the platform observer can figure out whether the moving clock has slowed or not."
According to special relativity, the platform observer will find that the moving clock has slowed. In this sense,
moving clocks run slow.
However, if the platform is moving so that its clocks consecutively pass a single stationary clock, the platform observer will find that moving platform clocks have speeded up and the stationary clock has slowed (according to special relativity). In this sense,
moving clocks run fast.
Einsteinians teach "moving clocks run slow" but don't even think of "moving clocks run fast", even though the latter conclusion is just as validly derivable from Einstein's 1905 postulates as the former.
Pentcho Valev