Astral Codex Ten Podcast

https://astralcodexten.substack.com/p/raise-your-threshold-for-accusing I. Many comments in yesterday’s post about self-identified bisexuals getting long COVID centered on a concern that self-identified bisexuals don’t really date both sexes, and are just claiming to be bi because it’s trendy. Bisexuals themselves hate this and have written many articles and papers about why you shouldn’t say it (1, 2, 3). But I especially appreciated a discussion in the comments between Nom de Flume, Ryan W, and others, giving a great statistical explanation for why it’s tempting to believe this, but why it isn’t true. Suppose someone (let’s say a woman) has exactly equal sexual attraction to both men and women.

https://astralcodexten.substack.com/p/replication-attempt-bisexuality-and I learned from Pirate Wires that CDC data show bisexuals were about 50% more likely than heterosexuals to report long COVID. Is this just because more women than men are bisexual, and more women than men get long COVID? Not exactly; in the data they cite, women (regardless of sexuality) have an 18% rate, and bisexuals (regardless of gender) have a 22% rate. (aren’t all these numbers really high? You can find almost any number depending on how you ask the question; questions along the lines of “have you had any persistent symptoms including fatigue, brain fog, shortness of breath, changes to taste/smell, etc, etc, etc, since having COVID?” tend to produce numbers from 20-30%; most will say this symptoms are mild and don’t affect their functioning very much) This seemed weird enough that I wanted to try replicating it with the ACX survey data (read more about the ACX survey here).

https://astralcodexten.substack.com/p/change-my-mind-density-increases Matt Yglesias tries to debunk the claim that building more houses raises local house prices. He presents several studies showing that, at least on the marginal street-by-street level, this isn’t true. I’m nervous disagreeing with him, and his studies seem good. But I find looking for tiny effects on the margin less convincing than looking for gigantic effects at the tails. When you do that, he has to be wrong, right?

https://astralcodexten.substack.com/p/highlights-from-the-comments-on-nerds Table of contents: 1: Comments By The Author Of The Original Post 2: Comments With Strong Opinions On The Definition Of Nerds, Geeks, Etc 3: Comments About Collecting 4: Comments Insisting That Sports Are Good 5: Comments About Enjoying Things Vs. Building Identities Around Them

https://astralcodexten.substack.com/p/mantic-monday-42423 Can AIs Predict The Future? By Which We Mean The Past? If we asked GPT-4 to play a prediction market, how would it do? Actual GPT-4 probably would just give us some boring boilerplate about how the future is uncertain and it’s irresponsible to speculate. But what if AI researchers took some other model that had been trained not to do that, and asked it? This would take years to test, as we waited for the events it predicted to happen. So instead, what if we took a model trained off text from some particular year (let’s say 2020) and asked it to predict forecasting questions about the period 2020 - 2023. Then we could check its results immediately! This is the basic idea behind Zou et al (2022), Forecasting Future World Events With Neural Networks. They create a dataset, Autocast, with 6000 questions from forecasting tournaments Metaculus, Good Judgment Project, and CSET Foretell. Then they ask their AI (a variant of GPT-2) to predict them, given news articles up to some date before the event happened. Here’s their result:

https://astralcodexten.substack.com/p/links-for-april-2023   [Remember, 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.]

Sam Kriss has a post on nerds and hipsters. I think he gets the hipsters right, but bungles the nerds. Hipsters, he says, are an information sorting algorithm. They discover things, then place them on the altar of Fame so everyone else can enjoy them. Before the Beatles were so canonical that they were impossible to miss, someone had to go to some dingy bar in Liverpool, think “Hey, these guys are really good”, and report that fact somewhere everyone else could see it. https://astralcodexten.substack.com/p/contra-kriss-on-nerds-and-hipsters  

[Content note: food, dieting, obesity] I. The Hungry Brain gives off a bit of a Malcolm Gladwell vibe, with its cutesy name and pop-neuroscience style. But don’t be fooled. Stephan Guyenet is no Gladwell-style dilettante. He’s a neuroscientist studying nutrition, with a side job as a nutrition consultant, who spends his spare time blogging about nutrition, tweeting about nutrition, and speaking at nutrition-related conferences. He is very serious about what he does and his book is exactly as good as I would have hoped. Not only does it provide the best introduction to nutrition I’ve ever seen, but it incidentally explains other neuroscience topics better than the books directly about them do. https://slatestarcodex.com/2017/04/25/book-review-the-hungry-brain/  

Table of Contents 1: Comments From The Author Of The Book 2: Stories From People In The Trenches 3: Stories From People In Other Industries 4: Stories From People Who Use Mechanical Turk 5: Comments About Regulation, Liability, and Vetocracy 6: Comments About The Act/Omission Distinction 7: Comments About The Applications To AI 8: Other Interesting Comments https://astralcodexten.substack.com/p/highlights-from-the-comments-on-irbs  

https://astralcodexten.substack.com/p/book-review-from-oversight-to-overkill I. Risks May Include AIDS, Smallpox, And Death Dr. Rob Knight studies how skin bacteria jump from person to person. In one 2009 study, meant to simulate human contact, he used a Q-tip to cotton swab first one subject’s mouth (or skin), then another’s, to see how many bacteria traveled over. On the consent forms, he said risks were near zero - it was the equivalent of kissing another person’s hand.