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Ask HN: Could we make a decision based on a random measured value?

1 pointsby bruno_rznover 6 years ago
Let&#x27;s have a set of two actions { goLeftOpenDoor, goRightRiseFlag }, and a deterministic algorithm to pick one action given a completely random input.<p>Alice and Bob are both aware of this algorithm, but they are very far from each other.<p>Alice and Bob each receives one particle from an entangled pair (A,B).<p>Alice makes a measurement on her particle, and so does Bob.<p>They now both also share a meaningless random value.<p>But, since they previously agreed on a way to _do something_ based on a random input, Bob actually picks _goRight_ and he goes right, and raises the flag.<p>Could then Alice know that the flag has been raised ? If so, why isn&#x27;t it considered as an actual information ?<p>Note : I think I&#x27;m really wrong somewhere here (and probably have &quot;divided by zero&quot; several times)... just correct me if&#x2F;where it&#x27;s the case.

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