I read that measurement of one property affects the outcome of the other entangled item. My question, why must the measurement of one system "affect" the other? More specifically, why can't their properties through time and space be determined by some initial action. For example, lets say we have 2 hypothetical batting machines that can hit a racket ball in _exactly_ the same way 100% of the time inside a racket ball room. We set each machine to hit identically. The initial position of impact( from bat to ball ) would determine its spin, position, and momentum. Because the hits are _identical_, all of their properties will be identical. ( The rooms are identical in dimensions as well ) Why can't we apply this to photon properties? I know photons will be opposite of each other but the idea I am trying to get across is the initial force that sends the photons on their way determines all of their properties which is why they are always in sync with each other. Not that their is some hidden communication between them. Can someone please explain why I am wrong?