I have a question that seems to reflect my main concern with QM. Here it is: Consider a series of polarisation-entangled photon pairs that are sent in opposite direction to two measuring devices (e.g. at opposite ends of the universe). The measurement consists of detection of a photon after passing a polarisation filter. The results are later compared. Suppose the measuring devices can't communicate the results in any way prior to comparison. The devices are macro-objects. The measurement results of either devices are read from the dial (computer screen) by Alice and Bob respectively, thereby experiencing reading that macro-result. However, the devices don't "know" each others results prior to comparison, while they do yield a result prior to comparison. It is certain that the results are correlated (the photons passing the filters at a specified relative angle). I imagine that the measurement results (on both sides) are unambiguous, because the devices are macro-objects and the readouts are practically conclusive. However, how can there be constructed a correlation before the necessary information is available (from the other side)? After all, theoretically, the correlation can only be (theoretically) established when the results are compared (and the results are no longer spacelike separated). Is there an interpretation for this?