There's something I don't manage to understand in the union between the relativity of simultaneity and the uncertainty of a quantum system's state. Observer A is in a lab on Earth. Observer B is approaching Earth at half the speed of light. On Earth, we build an experiment that gives a result between two possibilities, based on the measured state of a particle. That experiment sends a light beam to observer B, containing information about the measured state. Because of the relative speed of Observer B, the time on Earth in which the signal is sent, is in the future of Observer A. By the time Observer B receives the signal, the experiment has already taken place on Earth. However, not soon enough as to have sent the signal to Observer B. I'm under the impression that from Observer A's frame of reference one of these possibilities happened: The information about the measured state travelled faster than light to ObserverB. The measured state was an inevitability. In Observer A's future, the state was already decided before the measurement. None of those options seem possible.