PeterDonis
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The same places as in yours. As several posters have already pointed out, the curves in spacetime are exactly the same.obtronix said:where/when does the thought experiment start and end in his thought experiment?
Same as in your version.obtronix said:To compare World lines you need a start and ending event.
You don't actually care how anyone's clocks are set, since you are measuring differences in clock readings, not absolute clock readings. All you need are the differences in clock readings between the start and end of the three line segments in spacetime: the "stay at home" line segment, the "traveling outbound" line segment, and the "traveling inbound" line segment. Then you just compare the sum of the second and third with the first; the latter will be larger.obtronix said:He says in the beginning of his thought experiment everyone sets their clock to zero