THE SECRET TO EINSTEIN'S TWIN PARADOX

http://www.amazon.com/Relativity-Its.../dp/0486406768
Banesh Hoffmann, Relativity and Its Roots, p. 105: "In one case your clock is checked against two of mine, while in the other case my clock is checked against two of yours, and this permits us each to find without contradiction that the other's clocks go more slowly than his own."

This means that, according to Einstein's relativity, a clock consecutively meeting another system's clocks goes more slowly than them, AS JUDGED FROM THE OTHER SYSTEM. It doesn't matter whether the clock is moving and the other system's clocks stationary, or the clock is stationary and the other system's clocks moving:

http://www.pitt.edu/~jdnorton/teachi...y/Clocks_1.png

In other words, according to Einstein's relativity, the slowness of a clock is a valid conclusion only if that clock is visiting different points in another system and an observer in that other system is able to check the reading of the clock against readings of clocks situated at those points.

In the traditional twin paradox scenario, the tavelling twin's clock does visit different points of the stationary system, but the stationary twin's clock is not regarded as visiting different points of the moving system. For that reason the slowness of the stationary clock cannot be demonstrated in this scenario, no matter how hard you try. Only the slowness of the moving clock can be demonstrated, Divine Einstein, yes we all believe in relativity, relativity, relativity:

http://gjl038.g.j.pic.centerblog.net/3fea2faf.jpg

Pentcho Valev