Distance from the Big Bang? So zero then. But even if say energy or the speed of light are derived from other parameters, that doesn’t make the equation wrong,

Distance from the Big Bang? So zero then. But even if say energy or the speed of light are derived from other parameters, that doesn’t make the equation wrong, just incomplete. Anyway for all the phenomena we don’t have complete explanation for, none of them give any indication relativity is incorrect, and therefore there’s no reason to suppose tweaking it would help explain them.