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> if one entangled electron flies into a black hole then we would be able to know its spin by measuring the other one even if light from it won't reach us

All the arguments here mention what happens under SR but wouldn't GR be more appropriate? If an electron flies into a black hole, from the frame of reference of the observer doesn't it appear to get closer and closer to the black hole event horizon over time, but never actually enter? It only enters a black hole from its own frame of reference, doesn't it? So the outside observer would never see it enter the black hole, and light from the electron would always reach us.

Or is my understanding of General Relativity effects near a black hole event horizon wrong?

Thanks, I wanted to add that, too, but wasn't sure about it. I still am not, because this opens another can of worms. Can a black hole then not grow if from our POV nothing ever enters?

I thought that from the POV of the object falling into the black hole, time stretches.

From our point of view it can very well be sucked in.

It is the other way around. From the POV of the object falling they just fall in. Look up Preskill's work for explanation of how it works when entanglement comes into play.

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