Hi there, I've recently read some material on QM and entanglement in particular, and even thou I managed to understand the material I felt like it didn't contain the answer to one fairly simple question... When an entangled pair is produced, conservation of energy laws cause the members of the pair to be anti-correlated, member A is always complimentary or opposite of member B, be that spin, position of whatever. According to the entanglement theory, measuring the property of A immediately sets the property of B, which implies a change in B occurs upon measurement of A, but I don't really see it this way - since A and B have been produced anti-correlated, measurement of A doesn't change B in any way, it just indirectly defines B as the opposite of A, nothing really changes in B, it has been the same from the moment of production, the only thing that changes is that initial state of B is now known through the measurement of A. In the same logic, I can take a white and black lab mice, put them in identical boxes, shuffle the boxes to the point it is unknown which box holds the while and which box holds the black one, send one to China, the second to the US, opening either of the boxes and inspecting its content will immediately define the content of the other box, no matter the distance in between, but does that mean the two mice are entangled? I don't think so... My question is: What exactly suggests any FTL interaction between entangled particles or change if any of them takes place upon measurement?