Suppose I´m right in the middle of a train and suddenly bright light bolts out of both ends of my train. I swear that I saw both bolts of light at exactly the same time. Later I saw historical evidence of the char marks at the ends of my train. Although my train seemed stationary to me, an outside observer in another train, pointed in the opposite direction, told me that my train was moving. Really it seemed like his train was the one that was moving. We haven´t concluded who is right or wrong regarding my train´s motion. On further investigation, and unknown to me at the time of observation, we did find some char marks on the tracks that were separated by the same distance as the length of the train. Some say this is conclusive evidence that my train was stopped. However, the other observer has some credibility and I´d like to see if his perspective can also be true. Could my observations have been made while I was on a moving train even with this evidence on the tracks?