This question may be nonsensical, but I have to ask. I'm a noob to relativity so please bear with me. All observers measure the same speed of light, correct? We also know that there is no favored frame of reference. So... what is to stop an object from accelerating to 0.95c, taking a measurement of the speed of light within this reference frame, and then accelerating to the "new" 0.95c from that reference frame? Would this not qualify as exceeding light speed according to some arbitrary frame of reference? Conceivably, the object could continue to this forever unless a fixed frame is defined... Perhaps I am missing the point, but it seems as if there must either be a true rest frame in the universe or special relativity is self-contradictory. Any thoughts? I think I am misunderstanding because I haven't taken a crack at the maths. Maybe this turns into an exponential function of some sort at which the speeds are not additive but are bottle-necked by some limiting formula... Perhaps the arbitrary point will only see fractional increases?