We can’t accurately simulate the physical behavior even of pure water. (Yet; and from other reading about this I’ve done recently, it’s a long way off.) Therefore: Fantasies about simulating brains are fantastical.https://twitter.com/ashleythesmart/status/1032294373382340608 …
Well, I don’t know if you followed the links, but both are to discussions of pretty basic things about water that are not understood. Apparently there are many such. A lot of this has to do with its transient hydrogen-bonded multimers: http://www1.lsbu.ac.uk/water/water_hydrogen_bonding.html …
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I have a degree in chemistry. I don't need to follow the links to know that you are overstating the case. Shit, I've *made* water from its elements. And you're saying that I don't understand it *at all*?
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I didn’t say “at all.” Many chemical properties and reactions can be (and routinely are) predicted from approximations, idealizations, and rules of thumb. (These are not, in general reductions.) Some also can be predicted from reductive calculations. Some cannot.
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The behavior of the multimers is apparently critical to predicting gross bulk phenomena like supercooling phase transitions (the subject of the first article in this thread).
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