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LessWrong

Audio narrations of LessWrong posts.

technology philosophy

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13:38

“Debugging for Mid Coders” by Raemon

LessWrong (30+ Karma) ·

2025/08/17

I struggled with learning to debug code for a long time. Exercises for learning debugging tended focus on small, toy examples that didn't grapple with the complexity of real codebases. I would read advice on the internet like: Try to create a reliable replication of the debug Create a minimal demonstration of the bug Read error messages carefully Use a debugger I'd often be starting from a situation where the bug only happens sometimes and I have no idea when, the error log is about some unrelated

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20:14

“On Pessimization” by Richard_Ngo

LessWrong (30+ Karma) ·

2025/08/17

“Your worst sin is that you have destroyed and betrayed yourself for nothing.” - Dostoevsky When people set an ambitious goal, they can fail simply by not changing the world very much. But there's another surprisingly common way to fail: by achieving the opposite of their goal. I call this effect pessimization: the opposite of optimization. Though pessimization is an uncommon term, it's not an uncommon concept. We allude to it whenever we call someone their own worst enemy, or predict that their

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31:19

“Church Planting: When Venture Capital Finds Jesus”...

LessWrong (30+ Karma) ·

2025/08/16

I’m going to describe a Type Of Guy starting a business, and you’re going to guess the business: The founder is very young, often under 25. He might work alone or with a founding team, but when he tells the story of the founding it will always have him at the center. He has no credentials for this business. This business has a grand vision, which he thinks is the most important thing in the world. This business lives and dies by its growth metrics. 90% of attempts in this

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5:56

[Linkpost] “Anthropic Lets Claude Opus 4 & 4.1 End...

LessWrong (30+ Karma) ·

2025/08/16

This is a link post. Citing model welfare concerns, Anthropic has given Claude Opus 4 & 4.1 the ability to end ongoing conversations with its user. Most of the model welfare concerns Anthropic is citing draw back to what they discussed in the Claude 4 Model System Card. Claude's aversion to facilitating harm is robust and potentially welfare-relevant. Claude avoided harmful tasks, tended to end potentially harmful interactions, expressed apparent distress at persistently harmful user behavior,

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19:12

“The Collider Bias Theory of (Not Quite) Everything”...

LessWrong (30+ Karma) ·

2025/08/16

Quick Summary Collider bias and Berkson's paradox are pretty common and often neglected I think it's not just a niche statistical concept: it explains a bunch of interesting stuff, and has some use in applied rationality Scott Alexander has written about something similar, and there's a LW post that explains some of the findings in an accurate but slightly dry way. This post tries to make it clear and more readable Preamble It's your first day in prison. Despite your insistence that the man who

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5:22

“The Inheritors: a book review” by Alex_Altair

LessWrong (30+ Karma) ·

2025/08/16

I recently read a novel called The Inheritors, by William Golding. It was slow, it was painful, and before I was even done it had become one of my favorite books. For whatever reason, there is a difference between experiencing something and being told it. Even if everything you're told is accurate and salient, and you have all the essential models, the person that comes out the other end of an experience is different from the one who only learns about it. One of the invaluable functions of the

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36:04

“Towards data-centric interpretability with sparse...

LessWrong (30+ Karma) ·

2025/08/16

Nick and Lily are co-first authors on this project. Lewis and Neel jointly supervised this project. TL;DR We use sparse autoencoders (SAEs) for four textual data analysis tasks—data diffing, finding correlations, targeted clustering, and retrieval. We care especially about gaining insights from language model data, such as LLM outputs and training data, as we believe it is an underexplored route for model understanding. For instance, we find that Grok 4 is more careful than other frontier models

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14:28

“The Evolution of Agency - A Research Agenda” by...

LessWrong (30+ Karma) ·

2025/08/16

In Douglas Hofstadter's "Gödel, Escher, Bach," he explores how simple elements give rise to complex wholes that seem to possess entirely new properties. An ant colony provides the perfect real-world example of this phenomenon - a goal directed system without much central control. This system would be considered agentic under most definitions of agency, as it is goal directed, yet what type of agent is it? Can it be multiple agents at the same time? We’ll argue that this is the case and that if we

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37:29

“Thoughts on Gradual Disempowerment” by Tom Davidson

LessWrong (30+ Karma) ·

2025/08/16

Epistemic status: very rough! Spent a couple of days reading the Gradual Disempowerment paper and thinking about my view on it. Won’t spend longer on this, so am sharing rough notes as is Summary I won’t summarise the paper here! If you’re not familiar with it, I recommend reading the paper'sexec summ before continuing. There are lots of things I like about the paper! For example: It's a nice lens on the role that structural and competitive dynamics play in threat models from misalignment and

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27:06

“A philosophical kernel: biting analytic bullets” by...

LessWrong (30+ Karma) ·

2025/08/15

Sometimes, a philosophy debate has two basic positions, call them A and B. A matches a lot of people's intuitions, but is hard to make realistic. B is initially unintuitive (sometimes radically so), perhaps feeling "empty", but has a basic realism to it. There might be third positions that claim something like, "A and B are both kind of right". Here I would say B is the more bullet-biting position. Free will vs. determinism is a classic example: hard determinism is biting the bullet. One

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12:13

“Spending Too Much Time At Airports” by Zvi

LessWrong (30+ Karma) ·

2025/08/15

In honor of Nate Silver's analysis of when to leave for the airport, and because it's been an intense week, I thought I’d offer my thoughts on various related questions. Buying The Ticket As far as I can tell, the major booking portals for tickets are all basically the same. I’ve been using Orbitz for a long time because I’m used to the interface, it is clean and I have confidence it works. The times I checked Kayak and so on they all seemed to be exactly the same. I still book

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35:29

“Misalignment classifiers: Why they’re hard to...

LessWrong (30+ Karma) ·

2025/08/15

Even if the misalignment risk from current AI agents is small, it may be useful to start internally deploying misalignment classifiers: language models designed to classify transcripts that represent intentionally misaligned behaviour. Deploying misalignment classifiers now may provide qualitative and quantitative evidence about how current agents misbehave in real deployments. Further, we can later adapt misalignment classifiers into control monitors: language models that review transcripts with

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0:41

[Linkpost] “In defense of the amyloid hypothesis” by dsj

LessWrong (30+ Karma) ·

2025/08/15

This is a link post. I wrote a defense of the amyloid hypothesis as an ACX guest post. Scott called it "one of the best things I've read all year, and the first thing on Alzheimers that makes me actually feel like I understand something". ---First published: August 14th, 2025 Source: https://www.lesswrong.com/posts/iJFQ2JcKqzzjytW7C/in-defense-of-the-amyloid-hypothesis Linkpost

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13:20

“Training a Reward Hacker Despite Perfect Labels” by...

LessWrong (30+ Karma) ·

2025/08/15

Summary: Perfectly labeled outcomes in training can still boost reward hacking tendencies in generalization. This can hold even when the train/test sets are drawn from the exact same distribution. We induce this surprising effect via a form of context distillation, which we call re-contextualization: Generate model completions with a hack-encouraging system prompt + neutral user prompt. Filter the completions to remove hacks. Train on these prompt-completion pairs with the system prompt removed

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3:36

“Somebody invented a better bookmark” by Alex_Altair

LessWrong (30+ Karma) ·

2025/08/14

This will only be exciting to those of us who still read physical paper books. But like. Guys. They did it. They invented the perfect bookmark. Classic paper bookmarks fall out easily. You have to put them somewhere while you read the book. And they only tell you that you left off reading somewhere in that particular two-page spread. Enter the Book Dart. It's a tiny piece of metal folded in half with precisely the amount of tension needed to stay on the page. On the front it's pointed, to indicate

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1:24

[Linkpost] “METR Research Update: Algorithmic vs....

LessWrong (30+ Karma) ·

2025/08/14

This is a link post. TL;DR On 18 real tasks from two large open-source repositories, early-2025 AI agents often implement functionally correct code that cannot be easily used as-is, because of issues with test coverage, formatting/linting, or general code quality. This suggests that automatic scoring used by many benchmarks may overestimate AI agent real-world performance. ---First published: August 13th, 2025 Source:

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6:03

“Should you make stone tools?” by Alex_Altair

LessWrong (30+ Karma) ·

2025/08/14

Knowing how evolution works gives you an enormously powerful tool to understand the living world around you and how it came to be that way. (Though it's notoriously hard to use this tool correctly, to the point that I think people mostly shouldn't try it use it when making substantial decisions.) The simple heuristic is "other people died because they didn't have this feature". A slightly less simple heuristic is "other people didn't have as many offspring because they didn't have this feature". So

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3:29

“Doing A Thing Puts You in The Top 10% (And That...

LessWrong (30+ Karma) ·

2025/08/14

I've gone snowboarding about 30 times since I started learning a few years ago, but every time I'm on a lift, most of the other riders have been out 90 days just this season[1]. In fact, almost everyone I see has been skiing or snowboarding for decades, and comes out almost every day. It's hard to stay motivated when I'm the worst snowboarder on the mountain. This might seem like a big coincidence, but I'm also one of the worst runners I know AND one of the worst writers that I'm aware of[2]. I'm

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1:21

“Launching new AIXI research community website +...

LessWrong (30+ Karma) ·

2025/08/13

We have recently launched a new website / blog / community hub for AIXI / algorithmic information theory (AIT) researchers: https://uaiasi.com/ Marcus Hutter's vision is to strengthen the research community through more regular meetings and collaboration between formal conferences, make advising / mentorship available to a greater number of students by connecting them to other senior researchers (applicant volume exceeds his capacity), and speculatively fund some independent researchers. I have

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0:48

[Linkpost] “Why Are There So Many Rationalist Cults?”...

LessWrong (30+ Karma) ·

2025/08/13

This is a link post. Linkpost for Ozy Brennan's August 2025 Asterisk Magazine article. There's a lot to like about the Rationalist community, but they do have a certain tendency to spawn — shall we say — high demand groups. We sent a card-carrying Rat to investigate what's really going on. --- First published: August 13th, 2025 Source: https://www.lesswrong.com/posts/XPoM2X8nx4oeRXuF9/why-are-there-so-many-rationalist-cults Linkpost

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