Comments by "Dr Gamma D" (@DrDeuteron) on "Big Think"
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That’s good but not quite right. Take walking out of it. You prepare entangled compasses, ns + sn, and give one to Alice and on to Bob. If alice measures N, then Bob must measure S.
I’d she gets S, Bob is N.
So far the same as the coin analogy.
Here’s the spooky part:
If alice looks at hers along the EW direction and gets E, Bob has two options,
Check N/s and get either with 50%,
Or he can check EW and get west 100%,
How did Bob “know” alice checked EW? So his compass was W?
If she checked NS, then he gets W 50% and E 50%.
Then if she checks the off cardinal direcrions, you get percentages that cannot occur classically.
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