[Max Raker]

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It's unfortunate that Einstein used that phrase. There is nothing spooky about an observation unless we go into it with an expectation of how nature 'should' be. If we go in with 'nature is how we find it' then it wouldn't occur to us to label it spooky. A mystery, since we don't have a grasp of the situation, but nothing more.

Tribesmen attribute thunder/lightening to spooks and DS keeps up our innate animism with the latest mystery. Iow, the OP is nothing more than our 40,000 year old habit showing it's still part of our makeup. There is no sense in which the slit experiment 'violates' any part of reality, merely our preconceptions of it.

luckyme

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Depends. I think you misunderstand spooky action at a distance.

Take a photon, split it in to two entangled photons. At this point their spin is in a superposition.

Move the photons some distance apart (as far as you like). Now measure the spin on one of them. You get up, the other will measure as down - instantly.

Prior to measuring you had two photons with a spin that was in a superposition, after you have two photons in distinct states up and down (not up up or down down).

Unless you believe in hidden variables, some information has to have been passed between these two photons. Otherwise you wouldn't always get up + down or down + up (you would get an equal distribution of up up / down down / up down / down up).

The information that was exchange was not classical - in other words you cannot use it to communicate, but it was still exchange, and instantly no matter the distance.

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Right, but in entangled state you can not force the electron to be up or down. If you could do that then it would violate special relativity as you could use it to instantly communicate something over long distances.