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it explicitly doesn't say that psych. and thermodyn. arrow can be opposed, it would be an interesting implication though

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consider two civilizations living in different arrows, either completely ignoring each other, or trading

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also, what happens to the psych arrow when the thermodynamic one reverses? do we get a timeless moment?

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or does it maybe happen inhomogenously and there are, briefly, coexisting zones of countervalent arrows?

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I am probably not going at this with sufficient rigor, but that's just the author mind looking for concepts

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so essentially they take a computation and construct it in both thermodynamic arrows

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imagine having to heat computers in an entropy decreasing universe, installing "coldsinks"

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A universe with a decreasing entropy budget; reminds of me of Ted Chiang's "Exhalation" lightspeedmagazine.com/fiction/exhala

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re 4: if decreasing entropy is hostile but not unlivable, maybe increasers will encounter decreasers towards the reversal

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an increaser crossing over, slowly dying in decreasing entropy, finally relinquishing its last bit

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cc @The_Lagrangian

9:59 PM · May 20, 2016Twitter Web Client

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as a generic point I think its better to talk about resource use directly rather than complexity classes but yeah

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hm I was already too brainfried, has little to do with complexity theory, more complex systems + reversibility

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