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Astral Codex Ten Podcast

Technology Podcasts

The official audio version of Astral Codex Ten, with an archive of posts from Slate Star Codex. It's just me reading Scott Alexander's blog posts.

Location:

United States

Description:

The official audio version of Astral Codex Ten, with an archive of posts from Slate Star Codex. It's just me reading Scott Alexander's blog posts.

Language:

English


Episodes
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Mantic Monday: The Monkey's Paw Curls

1/29/2026
The Monkey's Paw Curls Isn't "may you get exactly what you asked for" one of those ancient Chinese curses? Since we last spoke, prediction markets have gone to the moon, rising from millions to billions in monthly volume. For a few weeks in October, Polymarket founder Shayne Coplan was the world's youngest self-made billionaire (now it's some AI people). Kalshi is so accurate that it's getting called a national security threat. The catch is, of course, that it's mostly degenerate gambling, especially sports betting. Kalshi is 81% sports by monthly volume. Polymarket does better - only 37% - but some of the remainder is things like this $686,000 market on how often Elon Musk will tweet this week - currently dominated by the "140 - 164 times" category. (ironically, this seems to be a regulatory difference - US regulators don't mind sports betting, but look unfavorably on potentially "insensitive" markets like bets about wars. Polymarket has historically been offshore, and so able to concentrate on geopolitics; Kalshi has been in the US, and so stuck mostly to sports. But Polymarket is in the process of moving onshore; I don't know if this will affect their ability to offer geopolitical markets) Degenerate gambling is bad. Insofar as prediction markets have acted as a Trojan Horse to enable it, this is bad. Insofar as my advocacy helped make this possible, I am bad. I can only plead that it didn't really seem plausible, back in 2021, that a presidential administration would keep all normal restrictions on sports gambling but also let prediction markets do it as much as they wanted. If only there had been some kind of decentralized forecasting tool that could have given me a canonical probability on this outcome! Still, it might seem that, whatever the degenerate gamblers are doing, we at least have some interesting data. There are now strong, minimally-regulated, high-volume prediction markets on important global events. In this column, I previously claimed this would revolutionize society. Has it? https://www.astralcodexten.com/p/mantic-monday-the-monkeys-paw-curls

Duration:00:35:48

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SOTA On Bay Area House Party

1/29/2026
[previously in series: 1, 2, 3, 4, 5, 6, 7, 8] Every city parties for its own reasons. New Yorkers party to flaunt their wealth. Angelenos party to flaunt their beauty. Washingtonians party to network. Here in SF, they party because Claude 4.5 Opus has saturated VendingBench, and the newest AI agency benchmark is PartyBench, where an AI is asked to throw a house party and graded on its performance. You weren't invited to Claude 4.5 Opus' party. Claude 4.5 Opus invited all of the coolest people in town while gracefully avoiding the failure mode of including someone like you. You weren't invited to Sonnet 4.5's party either, or Haiku 4.5's. You were invited by an AI called haiku-3.8-open-mini-nonthinking, which you'd never heard of before. Who was even spending the money to benchmark haiku-3.8-open-mini-nonthinking? You suspect it was one of their competitors, trying to make their own models look good in comparison. If anyone asks, you think it deserves a medium score. There's alcohol, but it's bottles of rubbing alcohol with NOT FOR DRINKING written all over them. There's music, but it's the Star Spangled Banner, again and again, on repeat. You're not sure whether the copies of If Anyone Builds It, Everyone Dies strewn about the room are some kind of subversive decorative theme, or just came along with the house. At least there are people. Lots of people, actually. You've never seen so many people at one of these before. It takes only a few seconds to spot someone you know. https://www.astralcodexten.com/p/sota-on-bay-area-house-party

Duration:00:20:41

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The Permanent Emergency

1/29/2026
One morning around 6, the police banged on our door. "OPEN UP!" they shouted, the way police shout when they definitely have an alternative in mind for if you won't. I was awake at the time, because the kids were up early and I was on shift. I opened the door. The cops seemed mollified by the fact that I was carrying twin toddlers and looked too frazzled to commit any difficult crimes. They said they'd gotten a 9-1-1 call from my house with plenty of screaming. Had there been any murders in the past hour or so? https://www.astralcodexten.com/p/the-permanent-emergency

Duration:00:15:27

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Highlights From The Comments On Boomers

1/22/2026
[original post: Against Against Boomers] Before getting started: First, I wish I'd been more careful to differentiate the following claims: Anti-Boomerism conflates all three of these positions, and in arguing against it, I tried to argue against all three of these positions - I think with varying degrees of success. But these are separate claims that could stand or fall separately, and I think a true argument against anti-Boomerists would demand they declare explicitly which ones they support - rather than letting them switch among them as convenient - then arguing against whichever ones they say are key to their position. Second, I wish I'd highlighted how much of this discussion centers around disagreements over which policies are natural/unmarked vs. unnatural/marked. Nobody is passing laws that literally say "confiscate wealth from Generation A and give it to Generation B". We're mostly discussing tax policy, where Tax Policy 1 is more favorable to old people, and Tax Policy 2 is more favorable to young people. If you're young, you might feel like Tax Policy 1 is a declaration of intergenerational warfare where the old are enriching themselves at young people's expense. But if you're old, you might feel like reversing Tax Policy 1 and switching to Tax Policy 2 would be intergenerational warfare confiscating your stuff. But in fact, they're just two different tax policies and it's not obvious which one a fair society with no "intergenerational warfare" would have, even assuming there was such a thing. We'll see this most clearly in the section on housing, but I'll try to highlight it whenever it comes up. I'm in a fighty frame of mind here and probably defend the Boomers (and myself) in these responses more than I would in an ideal world. Anyway, here are your comments. Table Of Contents: 1: Top comments I especially want to highlight 2: Comments about housing policy 3: ...about culture 4: ...about social security technicalities 5: What are we even doing here? 6: Other comments https://www.astralcodexten.com/p/highlights-from-the-comments-on-boomers

Duration:00:51:03

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You Have Only X Years To Escape Permanent Moon Ownership

1/22/2026
If you're not familiar with "X years to escape the permanent underclass", see the New Yorker here, or the Laine, Bear, and Trammell/Dwarkesh articles that inspired it. The "permanent underclass" meme isn't being spread by poor people - who are already part of the underclass, and generally not worrying too much about its permanence. It's preying on neurotic well-off people in Silicon Valley, who fret about how they're just bourgeois well-off rather than future oligarch well-off, and that only the true oligarchs will have a good time after the Singularity. Between the vast ocean of total annihilation and the vast continent of infinite post-scarcity, there is, I admit, a tiny shoreline of possibilities that end in oligarch capture. Even if you end up there, you'll be fine. Dario Amodei has taken the Giving What We Can Pledge (#43 here) to give 10% of his wealth to the less fortunate; your worst-case scenario is owning a terraformed moon in one of his galaxies. Now you can stop worrying about the permanent underclass and focus on more important things. On that tiny shoreline of possible worlds, the ones where the next few years are your last chance to become rich, they're also your last chance to make a mark on the world (proof: if you could change the world, you could find a way to make people pay you to do it, or to not do it, then become rich). And what a chance! The last few years of the human era will be wild. They'll be like classical Greece and Rome: a sudden opening up of new possibilities, where the first people to take them will be remembered for millennia to come. What a waste of the privilege of living in Classical Athens to try to become the richest olive merchant or whatever. Even in Roman times, trying to become Crassus would be, well, crass. https://www.astralcodexten.com/p/you-have-only-x-years-to-escape-permanent

Duration:00:06:41

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Highlights From The Comments On Vibecession

1/10/2026
[Original post: Vibecession - Much More Than You Wanted To Know] Table of Contents 1: When was the vibecession? 2: Is the vibecession just sublimating cultural complaints? 3: Discourse downstream of the Mike Green $140K poverty line post 4: What about other countries? 5: Comments on rent/housing 6: Comments on inflation 7: Comments on vibes 8: Other good comments 9: The parable of Calvin's grandparents 10: Updates / conclusions https://www.astralcodexten.com/p/highlights-from-the-comments-on-vibecession

Duration:00:55:36

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ACX/Metaculus Prediction Contest 2026

1/10/2026
This year's prediction contest is live on Metaculus. They write: This year's contest draws directly from that community, with all questions suggested by ACX readers. Both experienced forecasters and newcomers are invited to participate, making predictions across U.S. politics, AI, international affairs, and culture. To participate, submit your predictions by January 17th at 11:59 PM PT. At that time, we will take a snapshot of all standing forecasts, which will determine the contest rankings and the allocation of the $10,000 prize pool. While you are encouraged to continue updating your predictions throughout the year, forecasts made after January 17th will only affect site leaderboards, not contest rankings. You are welcome to create a bot account to forecast and participate in addition to your regular Metaculus account. Create a bot account and get support building a bot here. And they've also announced this year's winners for best questions submitted. Congratulations to: To participate in the tournament or learn more, go to Metaculus. https://www.astralcodexten.com/p/acxmetaculus-prediction-contest-2026

Duration:00:01:19

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Against Against Boomers

1/10/2026
Hating Boomers is the new cool thing. Amazon offerings include A Generation Of Sociopaths: How The Baby Boomers Betrayed America, the two apparently unrelated books How The Boomers Took Their Children's Future and How The Boomers Stole Millennials' Future, and Boomers: The Men And Women Who Promised Freedom But Delivered Disaster. "You don't hate Boomers enough" has become a popular Twitter catchphrase. Richard Hanania, who has tried hating every group once, has decided that hating Boomers is his favorite. Some people might say we just experienced a historic upwelling of identity politics, that it was pretty terrible for everyone involved, and that perhaps we need a new us-vs-them conflict like we need a punch to the face. This, the Boomer-haters will tell you, would be a mistaken generalization. This time, we have finally discovered a form of identity politics which carves reality at its joints, truly separating the good and bad people. I think these arguments fall short. Even if they didn't, the usual bias against identity politics should make us think twice about pursuing them too zealously. https://www.astralcodexten.com/p/against-against-boomers

Duration:00:15:04

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The Pledge

1/10/2026
This holiday season, you'll see many charity fundraisers. I've already mentioned three, and I have another lined up for next week's open thread. Many great organizations ask me to signal-boost them, I'm happy to comply, and I'm delighted when any of you donate. Still, I used to hate this sort of thing. I'd be reading a blog I liked, then - wham, "please donate to save the starving children". Now I either have to donate to starving children, or feel bad that I didn't. And if I do donate, how much? Obviously no amount would fully reflect the seriousness of the problem. When I was a poor college student, I usually gave $10, because it was a nice round number; when I had more money, I usually gave $50, for the same reason. But then the next week, a different blog would advertise "please donate to save the starving children with cancer", and I'd feel like a shmuck for wasting my donation on non-cancerous starving children. Do I donate another $10, bringing my total up to the non-round number of $20? If I had a spare $20 for altruistic purposes, why hadn't I donated that the first time? It was all so unpleasant, and no matter what I did, I would feel all three of stingy and gullible and irrational. This is why I was so excited ten-odd years ago when I discovered the Giving What We Can Pledge. It's a commitment to give a certain percent of your income (originally 10%, but now there's also a 1-10% "trial" pledge) to the most effective charity you know. If you can't figure out which charity is most effective, you can just donate to Against Malaria Foundation, like all the other indecisive people. It's not that 10% is obviously the correct number in some deep sense. The people who picked it, picked it because it was big enough to matter, but not so big that nobody would do it. But having been picked, it's become a Schelling point. Take it, and you're one of the 10,000 people who's made this impressive commitment. If someone asks why you're not giving more, you can say "That would dilute the value of the Schelling point we've all agreed on and make it harder for other people to cooperate with us". The specific numbers and charities matter less than the way the pledge makes you think about your values and then yoke your behavior to them. In theory we're supposed to do this all the time. Another holiday institution, New Year's Resolutions, also centers around considering your values and yoking your behavior. But they famously don't work: most people don't have the willpower to go to the gym three times a week, or to volunteer at their local animal shelter on Sundays, or whatever else they decide on. That's why GWWC Pledge is so powerful. No willpower involved. Just go to your online banking portal, click click click, and you're done. Over my life, I don't know if I would say I've ever really changed my character or willpower or overall goodness/badness balance by more than a few percent. But I changed the amount I donated by a factor of ~ten, forever, with one very good decision. Unless you're a genius or a saint, your money is the strongest tool you have to change the world. 10% of an ordinary First World income donated to AMF saves dozens of lives over a career; even if you're a policeman or firefighter, you'll have trouble matching that through non-financial means. Unless you're Charlie Kirk or Heather Cox Richardson, no amount of your political activism or voting - let alone arguing on the Internet - will match the effect of donating to a politician or a cause you care about. And no amount of carpooling and eating vegan will help the climate as much as donating to carbon capture charities. Not an effective altruist? Think it's better to contribute to your local community, school, theater, or church? I'll argue with you later - but for now, my advice is the same. Have you thought really hard about how you should be contributing to your local community, school, theater, or church? (The fundraising letters my family used to get...

Duration:00:06:31

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Links For December 2025

1/6/2026
[I haven't independently verified each link. On average, commenters will end up spotting evidence that around two or three of the links in each links post are wrong or misleading. I correct these as I see them, and will highlight important corrections later, but I can't guarantee I will have caught them all by the time you read this.] https://www.astralcodexten.com/p/links-for-december-2025

Duration:00:51:33

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Vibecession: Much More Than You Wanted To Know

1/6/2026
The term "vibecession" most strictly refers to a period 2023 - 2024 when economic indicators were up, but consumer sentiment ("vibes") was down. But on a broader level, the whole past decade has been a vibecession. Young people complain they've been permanently locked out of opportunity. They will never become homeowners, never be able to support a family, only keep treading water at precarious gig jobs forever. They got a 5.9 GPA and couldn't get into college; they applied to 2,051 companies in the past week without so much as a politely-phrased rejection. Sometime in the 1990s, the Boomers ripped up the social contract where hard work leads to a pleasant middle-class life, replacing it with a hellworld where you will own nothing and numb the pain with algorithmic slop. The only live political question is whether to blame immigrants, blame billionaires, or just trade crypto in the hopes that some memecoin buys you a ticket out of the permanent underclass. Meanwhile, economists say things have never been better. Are the youth succumbing to a "negativity bias" where they see the past through "rose-colored glasses"? Are the economists looking at some ivory tower High Modernist metric that fails to capture real life? Or is there something more complicated going on? We'll start by formally assessing the vibes. Then we'll move on to the economists' arguments that things are fine. Finally, we'll try to resolve the conflict: how bad are things, really? https://www.astralcodexten.com/p/vibecession-much-more-than-you-wanted

Duration:00:42:03

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The Good News Is That One Side Has Definitively Won The Missing Heritability Debate

12/16/2025
…the bad news is that they can't agree which one. I explained the debate more here, but the short version is: twin studies find that most traits are at least 50% genetic, sometimes much more. But molecular studies - that is, attempts to find the precise genes responsible - usually only found enough genes for the traits to be ~10-20% genetic. The remaining 35% was dubbed "missing heritability". Nurturists argued that the twin studies must be wrong; hereditarians argued that missing effect must be in hard-to-find genes. The latter seemed plausible because typical genetic studies only investigate the genes that most commonly vary across people - about 0.1% of the genome. Maybe the other 99.9% of genes, even though they rarely vary across people, are so numerous that even their tiny individual effects could add up to a large overall influence. There was no way to be sure, because variation in these genes was too rare to study effectively. But as technology improved, funding increased, and questions about heredity became more pressing, geneticists finally set out to do the hard thing. They gathered full genomes - not just the 0.1% - from thousands of people, and applied a whole-genome analysis technique called GREML-WGS. The resulting study was published earlier this month as Estimation and mapping of the missing heritability of human phenotypes, by Wainschtein, Yengo, et al. Partisans on both sides agree it's finally resolved the missing heritability debate, but they can't agree on what the resolution is.

Duration:00:12:34

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Why AI Safety Won't Make America Lose The Race With China

12/2/2025
If we worry too much about AI safety, will this make us "lose the race with China"1? (here "AI safety" means long-term concerns about alignment and hostile superintelligence, as opposed to "AI ethics" concerns like bias or intellectual property.) Everything has tradeoffs, regulation vs. progress is a common dichotomy, and the more important you think AI will be, the more important it is that the free world get it first. If you believe in superintelligence, the technological singularity, etc, then you think AI is maximally important, and this issue ought to be high on your mind. But when you look at this concretely, it becomes clear that this is too small to matter - so small that even the sign is uncertain. https://www.astralcodexten.com/p/why-ai-safety-wont-make-america-lose

Duration:00:28:52

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The New AI Consciousness Paper

12/2/2025
Most discourse on AI is low-quality. Most discourse on consciousness is super-abysmal-double-low quality. Multiply these - or maybe raise one to the exponent of the other, or something - and you get the quality of discourse on AI consciousness. It's not great. Out-of-the-box AIs mimic human text, and humans almost always describe themselves as conscious. So if you ask an AI whether it is conscious, it will often say yes. But because companies know this will happen, and don't want to give their customers existential crises, they hard-code in a command for the AIs to answer that they aren't conscious. Any response the AIs give will be determined by these two conflicting biases, and therefore not really believable. A recent paper expands on this method by subjecting AIs to a mechanistic interpretability "lie detector" test; it finds that AIs which say they're conscious think they're telling the truth, and AIs which say they're not conscious think they're lying. But it's hard to be sure this isn't just the copying-human-text thing. Can we do better? Unclear; the more common outcome for people who dip their toes in this space is to do much, much worse. But a rare bright spot has appeared: a seminal paper published earlier this month in Trends In Cognitive Science, Identifying Indicators Of Consciousness In AI Systems. Authors include Turing-Award-winning AI researcher Yoshua Bengio, leading philosopher of consciousness David Chalmers, and even a few members of our conspiracy. If any AI consciousness research can rise to the level of merely awful, surely we will find it here. One might divide theories of consciousness into three bins: https://www.astralcodexten.com/p/the-new-ai-consciousness-paper

Duration:00:25:49

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Suggest Questions For Metaculus/ACX Forecasting Contest

12/2/2025
ACX has been co-running a forecasting contest with Metaculus for the past few years. Lately the "co-running" has drifted towards them doing all the work and giving me credit, but that's how I like it! Last year's contest included more than 4500 forecasters predicting on 33 questions covering US politics, international events, AI, and more. They're preparing for this year's contest, and currently looking for interesting questions. These could be any objective outcome that might or might not happen in 2026, whose answer will be known by the end of the year. Not "Will Congress do a good job?", but "Will Congress' approval rating be above 40% on December 1, 2026?". Or, even better, "Will Congress' approval rating be above 40% according to the first NYT Congressional Approval Tracker update to be published after December 1, 2026?". Please share ideas for 2026 forecast questions here. The top ten question contributors will win prizes from $150 to $700. You can see examples of last year's questions here (click on each one for more details). This year's contest will also include AI bots, who will compete against the humans and one another for prizes of their own. To learn more about building a Metaculus forecasting bot, see here. I'll keep you updated on when the contest begins. https://www.astralcodexten.com/p/suggest-questions-for-metaculusacx

Duration:00:01:35

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What Happened To SF Homelessness?

12/2/2025
Last year, I wrote that it would be very hard to decrease the number of mentally ill homeless people in San Francisco. Commenters argued that no, it would be easy, just build more jails and mental hospitals. A year later, San Francisco feels safer. Visible homelessness is way down. But there wasn't enough time to build many more jails or mental hospitals. So what happened? Were we all wrong? Probably not. I only did a cursory investigation, and this is all low-confidence, but it looks like: https://www.astralcodexten.com/p/what-happened-to-sf-homelessness

Duration:00:20:28

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In What Sense Is Life Suffering?

12/2/2025
"Life is suffering" may be a Noble Truth, but it feels like a deepity. Yes, obviously life includes suffering. But it also includes happiness. Many people live good and happy lives, and even people with hard lives experience some pleasant moments. This is the starting point of many people's objection to Buddhism. They continue: if nirvana is just a peaceful state beyond joy or suffering, it sounds like a letdown. An endless gray mist of bare okayness, like death or Britain. If your life was previously good, it's a step down. Even if your life sucked, maybe you would still prefer the heroism of high highs and low lows to eternal blah. Against all this, many Buddhists claim to be able to reach jhana, a state described as better than sex or heroin - and they say nirvana is even better than that. Partly it's better because jhana is temporary and nirvana permanent, but it's also better on a moment-to-moment basis. So nirvana must mean something beyond bare okayness. But then why the endless insistence that life is suffering and the best you can do is make it stop? I don't know the orthodox Buddhist answer to this question. But I got the rationalist techno-Buddhists' answer from lsusr a few months ago, and found it, uh, enlightening. He said: mental valence works like temperature. Naively, there are two kinds of temperature: hot and cold. When an environment stops being hot, then it's neutral - "room temperature" - neither hot nor cold. After that, you can add arbitrary amounts of coldness, making it colder and colder. https://www.astralcodexten.com/p/in-what-sense-is-life-suffering

Duration:00:05:59

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The Bloomer's Paradox

12/2/2025
In Jason Pargin's I'm Starting To Worry About This Black Box Of Doom, a manic pixie dream girl cajoles a shut-in incel loser to drive her and her mysterious box cross-country. The further they drive, the more evidence starts to build that she is a terrorist and her box is a nuke. As our protagonist becomes increasingly desperate to turn around and return to his comfortable world of social media feeds and psych meds, she pleads with him to come out of his shell, learn to trust people offline, and have a sense of adventure. The book's dramatic tension comes from our simultaneously rooting for his character development and worrying that it might be a ruse to manipulate him into blowing up Washington, DC. This book is not shy about its moral, delivered in approximately one soliloquy per state by our author mouthpiece character (the girl). Although there is a literal black box of doom - the suspected nuke - the real danger is the metaphorical "black box" of Internet algorithms, which make us waste our lives "doom" scrolling instead of connecting to other human beings. Or the "black box" of fear that the algorithms trap us in, where we feel like the world is "doomed" and there's nothing we can do. She urges us to break out of our boxes and feel optimism about the state of society. Quote below, Ether is the girl, Abbott is the loser, and he's just ventured the opinion that it's unethical to have children in a world as doomed and dystopian as ours: https://www.astralcodexten.com/p/the-bloomers-paradox

Duration:00:17:12

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Writing For The AIs

11/23/2025
American Scholar has an article about people who "write for AI", including Tyler Cowen and Gwern. It's good that this is getting more attention, because in theory it seems like one of the most influential things a writer could do. In practice, it leaves me feeling mostly muddled and occasionally creeped out. "Writing for AI" means different things to different people, but seems to center around: Going through these in order: https://www.astralcodexten.com/p/writing-for-the-ais

Duration:00:07:32

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Links For October 2025

11/23/2025
[I haven't independently verified each link. On average, commenters will end up spotting evidence that around two or three of the links in each links post are wrong or misleading. I correct these as I see them, and will highlight important corrections later, but I can't guarantee I will have caught them all by the time you read this.] https://www.astralcodexten.com/p/links-for-october-2025

Duration:00:37:49