Main Question or Discussion Point
Is cheating going on in Einstein’s theory of relativity? For instance, the textbook “Fundamentals of Physics” (6th edition, published by John Wiley and Sons, jointly authored by David Halliday, Robert Resnick, and Earl Walker, on pages 925, 926 and 927, where the relativity theory was briefly introduced) said specifically and repeatedly that clocks would be used to measure time intervals. But I did not find any time interval that was read from the clocks. Instead all the time intervals used in the instruction were computed by means of Newtonian physics.