I would appreciate if someone could help figure out this thought experiment: Lets say I have two detectors named A and B. They both want to detect system C. For my naming convention I will say that C.B is the perturbed state of C after interacting with B Ok so both A and B decide to measure C at around the same time. If A measures C first then C becomes C.A and A becomes A.C. The instant after that, B will still be able to interact with C (as opposed to C.B) because time is an uncertainty, so now what is C? C.A or C.B? And is B now B.C or B.C.A?