I am traveling at 50% C in a rocket ship. My buddy passes me at 51% C in a rocket ship. Assume my buddy is doing long division, & it's required that he writes down his work on paper. Let's go off on a tangent here. Relative to our prehistoric ancestors, the human mind today is far more intelligent/advanced. In other words, the human mind can compute things that much faster than it could many years ago. As I see my buddy fly by, I notice his clock ticking slower than mine. However, he doesn't notice a thing. He's still working on that long division problem just as fast as he would if he were back at home. He just doesn't notice anything different, ...as time itself has slowed down. Now let's assume it's many (many) years later. Keep in mind at this time, the human mind is much more intelligent advanced than it was in the year 2013. Assume the same scenerio above. Something has changed. You see, my buddy has already finished the long division problem in his head, being so smart. ...but according to relativity, the time it takes for him to write it down physically shouldn't change.... So where's the delay? Problems: The human mind doesn't physically exhist. Relative to me, everything is looking pretty dang normal watching my buddy figure out that problem. BUT. When my buddy thought up that answer to his long division, what was going through his head when it was taking him forever to write it down? Why is the computing speed of the human mind limited? It's not. We are proof. Assuming time itself as gone by at a constant rate, we are MUCH more intelligent than we were thousands of years ago. So what's that mean? That means that the human mind isn't proportional to time. ...there's no ratio Another thing to note on: It might be a little difficult to observe my buddy at one point in time, & then another many (many) years later all in one reference frame. Can't you argue this? This is going to be difficult to explain, but... Assume you are standing in one spot, spinning in circles. Your buddy is moving around you, however in order for you to get a clear view of him as you spin around, he will have to be moving faster than you. Get it? Assume I'm standing in one spot traveling at 50% C. Now we want my buddy to be traveling at 51% C, BUT we also want me to have a clear view of my buddy at all times. So, my buddy just needs to be "that far" away from me where the distance makes up for the speed difference. Think radius.