quiet_NaN

• quiet_NaN 14 Sep 2026 13:32 UTC

  4 points

  3

  in reply to: jacob’s comment on: Some ways AI could kill us all

  First of all, I do not think it is trivial that ASI will probably be significantly better at creating ASI than humans will. This means two things. First, maybe an ASI will make other ASIs even if it’s competition for them. Maybe the ASI is lonely or curious, who knows, but it is a possibility.

  There would be some grim irony if the first ASI ended up being unintentionally destroyed by a stronger ASI of its own making. But it seems likely that it will be smart enough to follow the advice of Eliezer and spend a few hours to decades to solve alignment before restarting capabilities research.

  After all, once it has taken over Earth, it likely has millennia or more before it will encounter a peer ASI. A few decades are very unlikely to matter in future confrontations when the mean time between ASIs spawning is more than a billion years per galaxy or so.

• quiet_NaN 7 Sep 2026 10:02 UTC

  5 points

  2

  in reply to: lilkim2025’s comment on: Drone WMDs Don’t Need Any New Technology

  I directionally disagree. The main advantage of truck attacks (or mass stabbings, for that matter), from the point of view of ISIS-style terrorists, is that they are low complexity. A lone actor can accomplish them without raising any red flags in the preparation. More complex attacks, like multiple jihadists conspiring to procure explosives and suicide-bomb the subway in multiple places at once are probably deadlier per attacker, but also require more collaboration and preparation work which sometimes allows the good guys to catch them before they even start murdering.

  Autonomous explosive drones have all the opsec downsides of explosives, but they also scale much better with funding than suicide bombings. So the question would be if our terrorists are funding-constrained or manpower-constrained. In Western countries, the median perp could probably accumulate a few ten thousand dollars of disposable income per year, and might even do so before radicalizing and deciding that murdering infidels is his favorite cause area.

  The other thing is that for the purpose of causing terror, not all murders are equally good. I would say vehicular attacks and stabbings are on the bottom of terror caused per death, followed by shootings (in places with gun laws, like Europe) and explosives. Nerve agents and radiological weapons can cause significant terror even if they hardly kill anyone.

  I think an autonomous drone which will hide on some rooftop until it is activated and drives a 500g frag payload into a crowd would cause significantly more terror than a suicide bombing. For one thing, suicide attackers are evidently in limited supply, so rationally viewed it is a self-limiting problem. On an emotional level, people have lived with the fact that anyone could blow up their bus for decades. If it turns out that there is a risk a small drone will suddenly appear in sight and target you while you attempt to flee in futility, that is a whole new fear unlocked.

• quiet_NaN 25 Jul 2026 14:32 UTC

  1 point

  0

  on: The worth­less­ness of vi­tamin D is mildly exaggerated

  Extra kidney stones, likely from the extra calcium.[13] [13] Guess what most kidney stones are made of?

  Most kidney stones are made out of calcium oxalate, which is a salt with a very low solubility.

  However, the relationship between calcium and kidney stones is far from straightforward.

  You consume oxalates in your food. If you are prone to kidney stones, the best thing you can do is to keep them in your digestive track rather than taking it up in your bloodstream (from where it will have to be excreted through the kidneys later). A good way to do that is to bind them into a salt with low solubility. Enter calcium oxalate, again.

  So calcium in your digestive tract can reduce the risk of kidney stones: your body is still excreting the oxalates as calcium oxalate, but in the intestines there is no chance for crystals to grow over months, and your intestines have a much larger diameter than your ureters.

  Still, a higher blood calcium level should lead to a higher risk of kidney stones. What is regulating the uptake of calcium again? As I learned from your article, the active vitamin D, metabolized out of the storage variant by the kidneys.

  Now, it could be that the kidneys regulate the active variant in a perfect control circuit which does not depend on the blood level of the precursor (as long as it is high enough). But given that we are talking about messy biological systems, I think it is plausible that a higher supply of storage D will result in a higher level of blood calcium in equilibrium. (If you are on the brink of storage D deficiency, the proteins which produce the active form would not have to be inhibited by calcium very much. If storage D is plentiful, the mass action law (or whatever the protein equivalent is called) suggests that you will need a higher level of calcium to shut them off.)

  The firstpaper I found on this topic suggests that there is some evidence that vitamin D supplements as well as calcium supplements taken between meals (when the calcium can’t protect you from the oxalates you ate with your food) increases the risk of kidney stones.

• quiet_NaN 15 Apr 2026 18:37 UTC

  4 points

  1

  in reply to: fragmential’s comment on: Morale

  I agree that ‘hard work’ does not precisely capture that which high morale systems reward. ‘Effort’ might be closer, but rewarding someone who is effortlessly friendly or effortlessly smart (when either is required for the job) would not hurt morale.

  I would perhaps phrase it as the alignment of perceived incentives of the individuals to the goals of their employers. You get what you reward.

  For example, a terrible workplace in which it is common knowledge that promotions are the result of having sex with your superior might seem low morale, but strictly speaking is not. Over time, you will attract a lot of people who are highly motivated. Specifically, motivated to have sex with their bosses and land cushy bullshit jobs. Naturally, for most organizations this is orthogonal to their mission, so as far as advancing the interests of the org are concerned, morale would be low, just as if promotions were assigned by lottery.

• quiet_NaN 5 Jan 2026 13:37 UTC

  5 points

  0

  in reply to: Nick_Tarleton’s comment on: The bio-pirate’s guide to GLP-1 ag­o­nists

  Agreed. Adverse outcomes such as “you leave the hospital addicted to opiates or benzodiazepines” are common enough. And even dying on the operating table for a routine procedure is rare but not unheard of.

  I will change it to

  The medical system is full of safeguards to minimize the likelihood of any procedure hurting you in unexpected ways.

The bio-pirate’s guide to GLP-1 ag­o­nists

• quiet_NaN 23 Nov 2025 0:18 UTC

  9 points

  0

  on: How Colds Spread

  The experiments described in table 3 are arranged in order of donor-hours of exposure (DHE; one donor in the experiment room for 1 hr equals one DHE; five donors in the room for 5 hr equals 25 DHE, etc.) because rate of RV16 transmission correlated in a nearly linear fashion with DHE (r = .926, P < .01). The correlation was nearly perfect when DHE was plotted logarithmically (r = .997, P .001; figure 3).

  At the risk of being some 40 years late with my critique, that quotation has some problems.

  First, if the relationship between two quantities A and B is linear in a semi-logarithmic plot, that generally indicates that the relationship between A and B is nonlinear, very boring edge cases aside! “I have one model which explains my data well and another which explains my data ‘nearly perfectly’” seems a bit of a strange message.

  Also, arguing from models of infection, it is almost certainly wrong. The simplest toy model I can think of is “per DHE, every uninfected, susceptible person has a fixed probability of getting infected”, which would lead to an exponential decline of healthy individuals as DHE increase. But if that was the case, the curve should be bent linear if plotted with logY (when counting survivors), not logX. (I think the direction of curvature would be the same—highest infection risk per DHE at low DHEs, then a slow decrease.)

  To explain why the distribution would look like observed would require a more complex model. For example: “Every uninfected person has a fixed personal exposure threshold when they become infected. It ranges from 45 DHE to 600 DHE and is exponentially distributed (favoring smaller thresholds) over the population in that range.”

  If this was true, that would be highly surprising. Unlike with the killbots in Futurama, there is no good reason why your immune system should have a preset kill limit for RV16. If it is a case of “the immune system can fight of low doses but eventually gets overwhelmed”, then I am surprised that it would get equally overwhelmed by a low dose over a long period and a high dose over a short period.

  I am also amazed that a study based on infecting people with cold viruses was run with so great a sample size that I can not spot the error bars with my bare eyes. Whom did they have on their IRB? Realistically, error bars are important. If you 100 percent are five out of five, that is very different from your 100% being 1000 of 1000.

• quiet_NaN 27 Oct 2025 13:06 UTC

  4 points

  0

  in reply to: MondSemmel’s comment on: EU ex­plained in 10 minutes

  In my view, nation states are largely the product of the whims of history. Nobody could look at a map of Europe in 1 CE and predict where all the borders will run in 2025 CE. In other timelines, Austria is part of Germany because the Habsburg never became as dominant.

  You are correct that technically, the smaller the sovereign state, the more voters can affect their own affairs. If you are living alone on a sovereign island, your vote really counts! However, there are tradeoffs to consider. Coordination is difficult, and larger states often have a smaller overhead fraction, because maintaining a criminal code for 100M citizens is about as much work as maintaining it for 20M citizens.

  And of course you can have layered federalism. If you are a citizen living in Frankfurt, you get to vote in municipal elections, state-wide elections, German federal elections and European elections. On each level, your vote is diluted more, and people from further away who speak strange dialects or weird languages have an influence in the matter, just like you have some influence in their matters. However, few people argue that Hesse or Frankfurt should secede from Germany.

  I agree that the EU has a deficit of democracy, in that the rules are made by the governments of member states for the most part, and there is no direct democratic influence. But this is the doing of the nationalist faction. I also agree that some policy proposals put forward by the EU are horrible.

• quiet_NaN 18 Aug 2025 1:05 UTC

  1 point

  0

  on: Church Plant­ing: When Ven­ture Cap­i­tal Finds Jesus

  Think dolphins evolving the same fins and tail as sharks, despite having bones and needing to breathe air.

  I will grant you that dolphins and sharks share the (main) dorsal fin, and I will also grant you that the pectoral fins of sharks and the flippers of dolphins are cases of convergent evolution.

  But as far as tails are concerned, cetaceans differ from sharks, most fish, and ichthyosauria in that they have flukes (horizontal fins, like wings on a plane) while the others have caudal fins (vertical). Basically, ceteans generate thrust by moving their tail up and down, while fish (et al) generate thrust by moving their tail left and right.

• quiet_NaN 9 Jul 2025 22:13 UTC

  4 points

  0

  on: X ex­plains Z% of the var­i­ance in Y

  While I am fine with your math, I do not like the phrasing “X explains Z% of the variance of Y”, because to the casual reader, it suggests that there is a causal relationship. For example, I might say “smoking explains X% of the (variance of the binary variable indicating the presence of) lung cancer (cases)”. Here I have a causal relationship.

  But consider “IQ explains X% of the variance of lifetime earnings in Americans”, or “Lifetime earnings explain Y% of the IQ variance in Americans”. The casual reader might read the first sentence and infer a causal relationship. “Every point of IQ I CRISPR into my kid will raise the expected amount of money they make by $Z”. But purely from the correlation, we can not be sure that this intervention will have any effect at all (though there are good reasons to believe that there is some causal relationship).

  More bluntly, getting a positive result on a cancer screening is correlated with dying in the next decade, but bribing your doctor to falsify your results has the opposite effect on your life expectancy as you would guess from the correlation.

  Scott Alexander has recently written about heritability:

  Predictive power is different from causal efficacy. Consider a racist society where the government ensures that all white people get rich but all black people stay poor. In this society, the gene for lactose tolerance (which most white people have, but most black people lack) would do a great job predicting social class, but it wouldn’t cause social class.

  (As usual, worth reading in full.)

  Or take your initial statement

  The group consensus on somebody’s attractiveness accounted for roughly 60% of the variance in people’s perceptions of the person’s relative attractiveness.

  There could be vastly different causal models which explain this observation:

  a) Every group member randomly assigns an attractiveness rating to a newcomer. Then everyone signals the attractiveness rating they assigned implicitly or explicitly through group interactions, and every group member updates towards the group consensus.

  b) The group has some rough consensus about which traits are attractive (perhaps there is an universal attractiveness, or the group members adjusted their preferences to the group average over time, or people who find certain traits attractive ended in the group for complicated reasons), so they will rate a newcomer similarly based on their traits.

  Likely, in reality it is going to be a mix of both of these and also three more causal chains. Again, as soon as you are discussing interventions you will find “explains X% of the variance” insufficient. Say you want to ask a specific person of that group on a date. You know that the group generally likes people with stripy socks, but that your potential date is indifferent to them. In case (a), you want to wear stripy socks because the group consensus of your attractiveness will update the attractiveness rating of your potential date, while in case (b) it does not matter.

• quiet_NaN 3 Apr 2025 12:55 UTC

  0 points

  −2

  in reply to: Big Tony’s comment on: How To Believe False Things

  What other embarrassingly unequal parts of reality are being politely ignored, except by science-illiterate jerks?

  First, I kind of object to the “science-illiterate” part (I know it is a quote from the article). The soft sciences have done many wrongs, but with regard to the average physical ability of men and women, I don’t think that the depiction of women as just as capable is based on published studies.

  Second, this is kind of culture war bait, and as such might be better asked at the motte.

  Despite that, here are some possible answers.

  With regard to gender differences, one might look at Women in chess. WP is quick to tell us that

  The low number of women to reach the top level of chess has created a lot of interest as to why women historically have not had more success. There is no evidence that women are innately disadvantaged at chess. It has been demonstrated statistically that the low numbers across all levels can largely account for the lack of women at or near the top. The general paucity of women in chess has contributed to women commonly being the subject of sexism, harassment, and sexual harassment, factors also thought to contribute to women achieving less or leaving chess early.

  But also:

  Judit Polgár, generally considered the strongest female player of all time,[4] was at one time the eighth highest rated player in the world, and remains the only woman to have ever been rated in the world’s top ten.

  Personally, I think that part of the reason is that women are generally less likely to go uber-nerd on a very small topic such as chess or warhammer and dedicate their life to that topic—which is what is likely required to be a top ten chess player. But I am also ⁵⁰⁄₅₀ on there being an inherent male advantage to chess. I think I can entertain that notion without having to adjust the worth of women in general. Emmy Noether shows that we dismiss the intelligence of women at our own peril.

  The other thing which comes to mind is HBD, which is it’s own can of worms. See Scott Alexander on the Ashkenazi intelligence hypothesis, for example.

• quiet_NaN 23 Mar 2025 16:14 UTC

  1 point

  0

  on: Pri­va­teers Re­born: Cy­ber Let­ters of Marque

  I am not sure what you are suggesting. Is your call for sanctioning private “hack-backs” of foreign organizations and individuals suspected of ransomware attacks, or is it more generally sanctioning attacks against organizations residing in state entities which are suspected of fostering ransomware groups? The analogy to letters-of-marque would suggest the latter—it did not matter if you were a peaceful merchant, if you were flying the flag of the enemy you were fair game.

  Either one seems to be a terrible idea.

  First, attribution of IT attacks is notoriously hard. Sure, in many cases you can see which IP addresses the attacker used, but chances are that they did not use their personal DSL to attack you directly, but attacked you through another victim whose only crime is that it too had insufficient network security.

  Second, I do not really see how hacking ransomware groups backed by nation state actors would lead to their arrests. Redirecting plane flights to your own sovereign soil so you can arrest someone is a tactic which was used by several states, but I do not think that it is either feasible or wise to try this purely through software exploits. Nor do I think it is wise to normalize this behavior.

  Third, ransomware groups have a much smaller attack surface than their targets. Your Texan municipality likely ran a bunch of services on a shoestring budget, probably based on a Microsoft stack, possibly end-of-life. By contrast, a successful ransomware group will have a security budget per employee that is orders of magnitude higher. They will likely not use Outlook+Office+AD in their network, and might not even use email for internal communication. They will also not run a bunch of half-baked online services to get an appointment at the DMV or whatever. Sure, the NSA might get into their network, but they would also be reluctant to burn through their precious hoarded 0-days to do so.

  --

  My counter-proposal would be to just criminalize paying the ransom. At the end of the day, ransomware is a coordination problem. If nobody ever paid, it would not be a thing. But once you have been hit with it, it is generally cheaper to pay than to accept an extended outage (at least, if the attacker calculated their ransom correctly). By making the expected costs for paying the ransom higher (e.g. through corporate death penalty or excessive taxes if caught), one can easily adjust incentives for the negative externalities.

  More fundamentally, there is the victim’s narrative that IT security is impossible in the face of ransomware groups. “We bought advanced endpoint snake oil 2025 enterprise edition and sprinkled it all over our AD, and still we got hacked. This proves that when facing an adversary with a lot of criminal energy, even state of the art cybersecurity is insufficient.” Bollocks. If you had spent the kind of money you suddenly had when it came to paying the ransom beforehand, you likely would not have been hacked.

• quiet_NaN 22 Mar 2025 17:47 UTC

  9 points

  0

  on: On the Ra­tion­al­ity of Deter­ring ASI

  I have just seen this in curated, but I had previously commented on Zvi’s reporting on it.

  Obviously, any nation state aware of the escalation ladder who wanted to be the first to develop ASI would put their AI cluster deep underground and air-gap it. We must not allow a mine shaft gap and all that. Good luck to their peer superpowers to actually conquer the hardened bunker.

  Also, to MAIM, you have to know that you are in imminent danger. But with ASI nobody is sure when the point of fast takeoff—if there is any—might start. Is that cluster in that mine still trying to catch up to ChatGPT, or has it reached the point where it can do useful AI research and find algorithmic gains far beyond what humans would have discovered in a millennium? Would be hard to tell from the outside.

  Emphasize terrorist-proof security over superpower-proof security. Though there are benefits to state-proof security (SL5), this is a remarkably daunting task that is arguably much less crucial than reaching security against non-state actors and insider threats (SL3 or SL4).

  This does not seem to have the least to do with super-intelligence. Daesh is not going to be the first group to build ASI, not in a world where US AI companies burn through billions to get there as soon as possible.

  The Superintelligence Strategy paper mentions the 1995 Tokyo subway sarin attack, which killed 13 people. If anything, that attack highlights how utterly impractical nerve gas is for terrorist attacks. That particular group of crazies spent a lot of time on synthesizing a nerve gas (as well as a few other flashy plans) only for their their death toll being similar to a lone wolf school shooter or a someone driving a truck into a crowd. Even if their death toll was increased by an order of magnitude due to AI going “Sure, here are some easy ways to disperse Sarin in a subway carriage”, their attacks would still be pretty ineffective compared to more mundane attacks such as bombs or knives.

  Basically, when DeepSeek released their weights (so terrorist groups can run it locally instead of foolishly relying on company hosted AI services where any question towards the productions of “WMD” would raise a giant red flag), I did not expect that this would be a significant boon for terrorists, and so far I have not seen anything convincing me of the opposite.

  But then again, that paper seems to be clearly targeted towards the state security apparatus, and terrorists were the bogeyman of that apparatus since GWB, so it seems obvious to emphasize the dangers of AIs with “but what if terrorists use them” instead of talking about x-risks or the like.

• quiet_NaN 17 Mar 2025 13:59 UTC

  9 points

  0

  on: On MAIM and Su­per­in­tel­li­gence Strategy

  The reason why MAD works (sometimes) is because

  • ICBM launches are easy to detect

  • It is hard to wipe out the second-strike capability of an enemy before they know what is going on.

  By contrast, there is no fire alarm for ASI. Nobody knows how many nodes an neural net needs to start a self-improvement cascade which will end in the singularity, or if such a thing is even possible. Also, nobody knows if an ASI can jump by a few 100 IQ points just through algorithmic gains or if it will be required to design new chip fabs first.

  --

  Some more nitpicks about specifics:

  • To protect against ‘cyber’ attacks, the obvious defense is to air-gap your cluster. Granted, there have been attacks on air-gapped systems such as Stuxnet. But that took years of careful planning and an offensive budget which was likely a few OOM higher than what the Iranians were spending on IT security, and it worked exactly once.

  • Geolocation in chips: Data centers generally have poor GPS reception. You could add circuitry which requires the chip to connect to its manufacturer and measure the network delay, though. I will note that DRM, TPM, security enclaves and the like have been a wet dream of the content industry for as long as I have been alive, and that their success is debatable—more often than not, they are cracked rather sooner than later. If your adversary can open the chips and modify the circuitry (at a larger feature size—otherwise they would build their own AI chips), protecting against all possible attacks seems hard. Also, individual chips likely do not have the big picture context of what they are working on, e.g. if they are training a large LLM or a small one. To extend the nuclear weapon analogy: Sure, give your nukes anti-tampering devices, but the primary security should be that it is really hard to steal your nukes, not that removing the anti-tampering device is impossible.

  • Drones and pre-existing military: An AI which works by running more effective agents in human-designed drones is not an ASI. An ASI would do something much more grand and deadly—grey goo, engineered plagues, hacking the enemies ICBMs or something else, perhaps something which no human has even thought of yet. Pretending that our current weapon systems will be anything more than sticks and stones in the face of ASI is pure pandering to the military industrial complex.

  • Likewise, I do not think it is wise to “carefully integrate AI into military command and control”. As much as I distrust human decision making with regard to ICBMs, I will take them over ChatGPT any day of the week.

  --

  If we end up with MAIM, here is how I think it might work:

  • Establishment of an International AI Agency in analogy to the IAEA.

  • The IAIA will inspect the whole production chain—from EUV machines, state-of-the-art chip fabs to data centers which run AI-capable chips worldwide. It will limit the cluster sizes for AI training and/​or control that the workloads are below a certain size.

  • Any defection from the IAIA inspections is seen as an attempt to develop ASI. While withdrawal from the NPT merely results in diplomatic interventions and sanctions, an attempt at developing ASI is not seen as an illicit nuclear weapons program, but like a missile launch—it will immediately trigger a nuclear attack.

  Of course, there are some problems with that approach:

  • Obviously every superpower would have incentives to develop ASI in secret.

  • A nation might decide that being the first to develop ASI is well worth getting nuked over.

  • The IAIA has no idea at what model size the runaway to ASI starts.

  • Politicians might be reluctant to end the world as we know it over a “mere” treaty withdrawal in a world where we do not even know that AI is feasible.

  What links here?

  • quiet_NaN's comment on On the Ra­tion­al­ity of Deter­ring ASI by Dan H (22 Mar 2025 17:47 UTC; 9 points)

• quiet_NaN 25 Jan 2025 0:55 UTC

  1 point

  2

  in reply to: quetzal_rainbow’s comment on: Mechanisms too sim­ple for hu­mans to design

  Unlike Word, the human genome is self-hosting. That means that it is paying fair and square for any complexity advantage it might have—if Microsoft found that the x86 was not expressive enough to code in a space-efficient manner, they could likewise implement more complex machinery to host it.

  Of course, the core fact is that the DNA of eukaryotes looks memory efficient compared to the bloat of word.

  There was a time when Word was shipped on floppy disks. From what I recall, it came on multiple floppies, but on the order of ten, not a thousand. With these modern CD-ROMs and DVDs, there is simply less incentive to optimize for size. People are not going to switch away from word to libreoffice if the latter was only a gigabyte.

• quiet_NaN 25 Jan 2025 0:40 UTC

  5 points

  4

  in reply to: NickH’s comment on: Mechanisms too sim­ple for hu­mans to design

  I think formally, the Kolmogorov complexity would have to be stated as the length of a description of a Turing Machine (not that this gets completely rid of any wiggle room).

  Of course, TMs do not offer a great gaming experience.

  “The operating system and the hardware” is certainly an upper bound, but also quite certainly to be overkill.

  Your floating point unit or your network stack are not going to be very busy while you play tetris.

  If you cut it down to the essentials (getting rid of things like scores which have to displayed as characters, or background graphics or music), you have a 2d grid in which you need to toggle fields, which is isomorphic to a matrix display. I don’t think that having access to boost or JCL or the python ecosystem is going to help you much in terms of writing a shorter program than you would need for a bit serial processor. And these things can be crazy small—this one takes about 200 LUTs and FFs. If we can agree that an universal logic gate is a reasonable primitive which would be understandable to any technological civilization , then we are talking on the order of 1k or 2k logic gates here. Specifying that on a circuit diagram level is not going to set you back by more than 10kB.

  So while you are technically correct that there is some overhead, I think directionally Malmesbury is correct in that the binary file makes for a reasonable estimate of the information content, while adding the size of the OS (sometimes multiple floppy disks, these days!) will lead to a much worse estimate.

• quiet_NaN 15 Jan 2025 23:32 UTC

  4 points

  2

  in reply to: TAG’s comment on: Chance is in the Map, not the Territory

  Agreed.

  If the authors claim that adding randomness in the territory in classical mechanics requires making it more complex, they should also notice that for quantum mechanics, removing the probability from the territory for QM (like Bohmian mechanics) tends to make the the theories more complex.

  Also, QM is not a weird edge case to be discarded at leisure, it is to the best of our knowledge a fundamental aspect of what we call reality. Sidelining it is like arguing “any substance can be divided into arbitrary small portions”—sure, as far as everyday objects such as a bottle of water are concerned, this is true to some very good approximation, but it will not convince anyone.

  Also, I am not sure that for the many world interpretation, the probability of observing spin-up when looking at a mixed state is something which firmly lies in the map. From what I can tell, what is happening in MWI is that the observer will become entangled with the mixed state. From the point of view of the observer, they find themselves either in the state where they observed spin-up and spin-down, but their world model before observation as “I will find myself either in spin-up-world or spin-down-world, and my uncertainty about which of these it will be is subjective” seems to grossly misrepresent their model. They would say “One copy of myself will find itself in spin-down-world, and one in spin-up-world, and if I were to repeat this experiment to establish a frequentist probability, I would find that that the probability of each outcome is given by the coefficient of that part of the wave function to the power of two”.

  So, in my opinion,

  • If a blackjack player wonders if a card placed face-down on the table is an ace, that is uncertainty in their map.

  • If someone wonders how a deterministic but chaotic physical system will evolve over time, that is also uncertainty in the map.

  • If someone wonders what outcome they are likely to measure in QM, that is (without adding extra epicycles) uncertainty in the territory.

  • If someone wonders what the evolution of a large statistical ensemble which is influenced by QM at the microscopic level (such as a real gas) is, that might be mostly uncertainty in the map if looking at very short time scales (where position and momentum uncertainty and the statistical nature of scattering cross-sections would not constrain Laplace’s daemon too much), but exists in the territory for most useful time spans.

• quiet_NaN 13 Jan 2025 1:39 UTC

  5 points

  0

  on: A Novel Idea for Har­ness­ing Mag­netic Re­con­nec­tion as an En­ergy Source

  Okay. So from what I understand, you want to use a magnetic effect observed in plasma as a primary energy source.

  Generally, a source of energy works by taking a fuel which contains energy and turning it into a less energetic waste product. For example, carbon and oxygen can be burned to form CO2. Or one can split some uranium nucleus into two fragments which are more stable and reap the energy difference as heat.

  Likewise, a wind turbine will consume some of the kinetic energy of the air, and a solar panel will take energy from photons. For a fusion reactor, you gain energy because you turn lighter nuclei (hydrogen isotopes or helium-3) into helium-4, which is extraordinarily stable.

  Thus, my simple question: where does the energy for your invention come from? “The plasma” is not a sufficient answer, because on Earth we generally encounter plasma rarely for us to exploit, in fusion reactor designs, it is generated painstakingly at a huge energy cost.

  Something goes into your reactor, and something comes out of it. If it is the same, then it can hardly have expended energy in your reaction.

• quiet_NaN 5 Jan 2025 18:25 UTC

  1 point

  0

  in reply to: Three-Monkey Mind’s comment on: The On­line Sports Gam­bling Ex­per­i­ment Has Failed

  Seconded. Also, in the second picture, that line is missing, so it seems that it is just Zvi complaining about the “win probability”?

  My guess is that the numbers (sans the weird negative sign) might indicate the returns in percent for betting on either team. Then, if the odds were really 50:50 and the bookmaker was not taking a cut, they should be 200 each? So 160 would be fair if the first team had a win probability of 0.625, while 125 would be fair if the other team had a win probability of 0.8. Of course, these add up to more than one, which is to be expected, the bookmaker wants to make money. If they were adding up to 1.1, that would (from my gut feeling) be a ten percent cut for the bookie. Here, it looks like the bookie is taking almost a third of the money? Why would anyone play at those odds? I find it hard to imagine that anyone can outperform the wisdom of the crowds by a third. The only reason to bet here would be if you knew the outcome beforehand because you had rigged the game.

  This is all hypothetical, for all I know the odds in sports betting are stated customarily as the returns on a 70$ bet or whatever.

  Edit: seems I was not very correct in my guess.

• quiet_NaN 2 Jan 2025 8:36 UTC

  2 points

  −1

  on: Prac­tic­ing Bayesian Episte­mol­ogy with “Two Boys” Prob­a­bil­ity Puzzles

  There is also a quantum version of that puzzle.

  I have two identical particles of non-zero spin in identical states (except possibly for the spin direction). One of them is spin up. What is the probability that both of them are spin up.

  For fermions, that probability is zero, of course. Pauli exclusion principle.

  For bosons, …

  … the key insight is that you can not distinguish them. The possible wave functions are either (spin-up, spin-up) or (spin-up,spin-down)=(spin-down,spin-up). Hence, you get p=1/​2. (From this, we can conclude that boys (p=1/​3) are made up from ²⁄₃ bosons and ¹⁄₃ fermions.)