Reply to thread

Perhaps a bad example then. so use einstein's in which the source of the light was lightning bolts at the front and rear of the train. Regrdlesss of examples, Newtonian math has been replaced so that while it appears to be true in extreme examples it is actually only almost true. 2+2=almost 4. I have to admit that I am offering suggestions at the limits of my understanding. (am I supposed to be comparing Newtonian to non-newtonian or Euclidian to non-euclidian?)