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Vladimir_Nesov comments on A Rationalist's Tale - Less Wrong
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Not by a long shot. Physics is probably mostly irrelevant here, it focuses only on our world; and decision theory is so flimsy and poorly understood that any related effort should be spent on improving it, for it's not even clear what it suggests to be the case, much less how to make use of its suggestions.
I've seen QM become important because of decision problems where agents have to coordinate between quantum branches in order to reverse time. I can't go into that here but I'd at least like to flag that there are decision theory problems where things like quantum information theory shows up.
That actually sounds like it has a possibility of being interesting.
Physics focuses on worlds across the entire quantum superposition. That's a pretty big neighborhood, no? Agreed about decision theory. When I said "choose to spend" I meant "I have a few hours to kill but I'm too lazy to do problem sets at the moment", not "I choose thaumaturgy as the optimal thing to study".
Okay, that makes sense as a rich playground for acausal interaction. I don't know what pieces of intuition about physics you refer to as useful for reasoning about acausal effects of human decisions though.