Since fast moving objects appear to contract (to an outside observer) the faster they go, if you have an object traveling at near light speed, it will appear va

Since fast moving objects appear to contract (to an outside observer) the faster they go, if you have an object traveling at near light speed, it will appear vanishingly short, regardless of its true length. So let there be a one mile long object, let it travel at nearly light speed for five seconds. As God, freeze time after 5 seconds and place two measuring stations: one touching the head of Object from Observer's point of view, and one touching the tail of Object from Object's point of view (we can teleport around instantly so we can verify that we've got everything set up correctly with no penalty). Observer Head thinks Object Head and Object Tail are at about 5 light-seconds + 1 mile from origin (because Object is vanishingly short, and Object Head started at 1 mile from origin). But within Object, the Tail is 1 mile behind. So Object Tail will signal Observer Tail at about 1 mile/c before it reaches where it supposedly is, and Observer Tail instantly signals Observer Head, thus Observer Head receives causality from its signal before it sends its signal. Not sure how the universe resolves that. Unless the universe can "overclock" and become indefinitely fast at propagating and processing information when need be. I think my example isn't entirely sound because I forget the exact math (it's been a long time), so you might have to tweak the example to be fully mathematically sound, but the general concept of causal contradiction within one's own frame of reference should be sound, I think.