Is causality also relative, if that is so, son you hit a golden pot in physics, “that’s your causality man, that’s your problem. I don’t have a f** with that.” But you travel backwards in time. “Nay that’s how you see it, you speed blinded moron, I don’t give a damn about what you think of me. Even if I start late at home, I am gonna kick your ass man, I will reach work early. You will think I started now and came back last nanosecond but that’s because you have a sloppy watch hen hen hen”
Last night I wrote a very long article and its now a featured blog on “physics” at this website. It has happened many times already. But there I told you that “speed of invariance” — invariance of speed also means speed of invariance, I changed linguistic grammar, not the physics, is broken when invariance of proper-time is broken. For photons we thought taking clue from its zero-mass we can also set the proper-time to be zero.