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20 September
Statistician at Columbia; writes Statistical Modeling, Causal Inference, and Social Science, and wrote Bayesian Data Analysis.
19 September
Technical educator, conference speaker and developer relations engineer based in Ottawa, Canada. Author of the Anubis bot filter and of over 400 articles at xeiaso.net.
I forgot how pretty Death Stranding is. Photos to come in following posts. Related
Dutch bootstrapper who builds and runs their internet startups alone — Nomads.com, Remote OK, Hoodmaps, Photo AI and Interior AI — and has written about it at levels.io since 2013. Posts as @levelsio.
✨ Finally built a timeline for https://t.co/HGCLKS5BD6 now I always wanted to make my site a bit more social, because I had profiles and trip overlaps and you could kinda see where other people went, but not something like this So on this new page you can see people near you, where everyone's traveling too, etc. There's the [ For you ] tab and [ Following ], like on X. So you can see people you follow, or just everyone I hope I can improve it more so the site will result in more serendipitous connections, especially now that's it's free Also nice you can see where people will be in the future… Quoting @levelsio 🌎 https://t.co/1z6UN2d0nh globe is now ready for space travel too 😊 Related
18 September
Writes The Diff, a newsletter on inflections in finance and tech read by hedge fund managers, founders and VCs. Previously worked in finance at SAC Capital/Point72.
17 September
Criminal defence lawyer in New York; writes Simple Justice, mostly about how criminal law works in practice rather than in theory.
15 September
Author of The 4-Hour Workweek and Tools of Titans, and host of The Tim Ferriss Show podcast.
7 Quotes on Writing I hope you enjoy the following gems as much as I have… “Write to please just one person. If you open a window and make love to the world, so to speak, your story will get pneumonia.” — Kurt Vonnegut “You must stay drunk on writing so reality cannot destroy you.” — Ray Bradbury “Be regular and orderly in your life like a bourgeois, so that you may be violent and original in your work.” — Gustave Flaubert “The writer should never be ashamed of staring. There is nothing that does not require his attention.” — Flannery O’Connor “A writer is unfair to himself when he is unable… Related
Computer science professor who works on fast data processing; co-author of the simdjson parser and a weekly blogger about software performance since 2004.
A new fast_float release... fast_float is a super fast number parser in C++ (used by GCC, MySQL, your browser...). The latest release adds support for parsing numbers following the JavaScript standard, so things like 05.1 can be accepted (!!!). JavaScript Related
Writer of the personal-finance blog Of Dollars And Data and author of Just Keep Buying and The Wealth Ladder. Chief Operating Officer at Ritholtz Wealth Management.
14 September
Writes Where's Your Ed At and hosts Better Offline; runs a tech PR firm, and argues at length that the AI business does not add up.
AI Is Already In Dangerous Hands If you liked this piece, you should subscribe to my premium newsletter, and you can subscribe on the following links: $70 a year, $18 a quarter, or $7 a month. In return you get a weekly newsletter that’s usually anywhe…
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Co-creator of Django and creator of Datasette; writes daily at simonwillison.net.
Quoting Laurie Voss The cost of writing code collapsed, and the cost of reviewing, fixing and operating it is following, and I'm assuming it gets there. What's left of making software is finding out what people actually want, defining it p…
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10 September
Director of institutional asset management at Ritholtz Wealth Management. Writes the A Wealth of Common Sense blog and co-hosts the Animal Spirits podcast with Michael Batnick.
9 September
Software engineer and founder of Block Party; previously an engineer at Pinterest and Quora, and a co-founder of the non-profit Project Include and the tech diversity data project Where are the Numbers?
following my instinct around and apologizing on its behalf for dumb mistakes. did we tame the wheat or did the wheat tame us Related
8 September
Mathematician at UCLA, working mainly in harmonic analysis and partial differential equations. Writes What's new, a long-running blog on their research, open problems and expository notes.
I wrote recently about how the collection of good, fruitful open problems is now being mined in a non-renewable fashion, leading to the potential scenario of these problems becoming scarce. This may seem unintuitive at first, since the set of possible problems one could ask is infinite. Perhaps the following analogy can help: a country or region can suffer a critical shortage of drinking water while simultaneously being surrounded by a massive ocean. One can easily generate any number of open problems in mathematics at will, such as working out the 10^10^10th digit of pi. But the vast majorit… Related
Writer and teacher on productivity and personal knowledge management. Author of Building a Second Brain and founder of Forte Labs, which runs the course of the same name.
These AISB students found their breakthrough by focusing on curating AI input rather than blindly following trend Related
Writes Where's Your Ed At and hosts Better Offline; runs a tech PR firm, and argues at length that the AI business does not add up.
Concentration Risk If you liked this piece, you should subscribe to my premium newsletter, and you can subscribe on the following links: $70 a year, $18 a quarter, or $7 a month. In return you get a weekly newsletter that’s usually anywhe…
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Economist and Nobel laureate. Wrote a New York Times column for 25 years until December 2024 and now publishes several times a week on Substack.
5 September
British historian, translator and broadcaster; author of Rubicon and Dominion, and co-host of The Rest Is History podcast.
A bitter-sweet memory. I'd had just had a very bad medical diagnosis, & was fearing the worst - & I realise now that following in the footsteps of the Beatles was a way to snatch after something that made me feel happy. (And in the event, all was well!) Quoting @NemoNihil1664 Here's an excellent walk around The Beatles' London with the effervescent @holland_tom ; by no means a Tragical History Tour 🍌. Related
4 September
Interactive fiction author and hacker; wrote Spider and Web and Hadean Lands, and designed the Glulx virtual machine.
Bluesky Following up my speculations about the Hugo "Best Game” finalists, now that the winners are out. Turns out _Clair Obscur_ won handily. Good for the game! Bad if you're looking for finely-sliced statistical commentary. blog.zarfhome.com
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Mastodon Following up my speculations about the Hugo "Best Game” finalists, now that the winners are out. Turns out _Clair Obscur_ won handily. Good for the game! Bad if you're looking for finely-sliced statistical commentary. Also, I promise I will read _Inventing the Renaissance_ now. blog.zarfhome.com
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27 August
Technical educator, conference speaker and developer relations engineer based in Ottawa, Canada. Author of the Anubis bot filter and of over 400 articles at xeiaso.net.
26 August
Cartoonist and comics theorist, author of Understanding Comics, Reinventing Comics, Making Comics and the graphic novel The Sculptor.
Stephen Marche on Trump: "He's following in the grand tradition of American leaders starting wars with people they don't understand—then wondering what went wrong." America Related
25 August
Web standards author and speaker; wrote the CSS: The Definitive Guide series and co-founded the An Event Apart conference.
Pronunciation poll! Which of the following is the closest to how you pronounce “sherbet”? Related
18 August
Writer and teacher on productivity and personal knowledge management. Author of Building a Second Brain and founder of Forte Labs, which runs the course of the same name.
3 August
Economist at George Mason University. Writes Overcoming Bias on prediction markets, signalling and the far future, and wrote The Age of Em and The Elephant in the Brain.
26 July
Mathematician and Senior Lecturer in the Mathematics department at Columbia University. Author of the book Not Even Wrong and of the long-running physics blog of the same name.
Requiem for a Field? Kevin Hartnett posted the following Friday: My profile of @Jacob_Tsimerman, published the morning he won the Fields Medal, and hours before he announced he’s going to @OpenAI, reads like a requiem for a field. While I’m…
OpenAI Related
22 July
Writer on learning and skill acquisition; author of Ultralearning and Get Better at Anything, known for the MIT Challenge and the Year Without English.
14 July
Investing columnist for The Wall Street Journal and editor of the revised edition of Benjamin Graham's The Intelligent Investor.
Their words
Following along as he picks data fallacies apart is a lot of fun, and I can't wait to read the whole book.
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jasonzweig.com
13 July
Climate scientist and energy systems analyst; writes The Climate Brink with Andrew Dessler and leads climate research at Stripe.
12 July
Cardiologist and founder of the Scripps Research Translational Institute; writes Ground Truths on biomedical research, and wrote Super Agers and Deep Medicine.
30 June
Economist at the Hoover Institution; wrote The Fiscal Theory of the Price Level and blogs as The Grumpy Economist.
24 June
Developer, author and YouTuber covering Raspberry Pi, homelab hardware and Ansible automation. Author of Ansible for DevOps.
2 June
Non-fiction writer, podcaster and occasional TV host. Author of thirteen books including The Ghost Map, Where Good Ideas Come From and Extra Life, host of the PBS series How We Got To Now, and author of the Adjacent Possible newsletter on innovation.
Software developer and entrepreneur; co-founder of Heroku, author of The Twelve-Factor App, and a researcher at Ink & Switch.
Free software developer; maintainer of sway, wlroots, aerc and scdoc, and founder of the SourceHut (sr.ht) software forge.
Vim Classic 8.3.0 released Following up on my earlier announcement that I was forking Vim, I’m happy to announce the first release of my fork today: Vim Classic 8.3.0. I have written a release announcement for vim-classic.org, which you can read…
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18 May
Clinical psychologist and clinical professor of psychiatry at UCSF. His 2010 meta-analysis established psychodynamic therapy as an evidence-based treatment; he has argued ever since that "evidence-based therapy" is used as a marketing term.
15 May
Free software developer; maintainer of sway, wlroots, aerc and scdoc, and founder of the SourceHut (sr.ht) software forge.
11 May
Writer and author of All the Wrong Moves; his newsletter covers meditation, relationships and creativity, and he co-runs a perfume line.
Their words
Almost any time I hear that someone has had a damaging experience with meditation, I find that it's because they're violating this rule.
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sashachapin.substack.com
25 April
Programmer known online as technomancy; author of Leiningen, the Clojure build tool, and a maintainer of the Fennel programming language.
JavaScript
Their words
As the software industry is largely driven by trends and fashion, React's "cool factor" led to a mass amnesia regarding how to make normal, well-designed web apps made of HTML with a sprinkling of scripting on top and everything became one big tangled, brittle mass of Javascript that completely keeled over when scripting wasn't available.
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technomancy.us
21 April
Writer and consultant on formal methods and software correctness; author of Practical TLA+ and Logic for Programmers.
4 April
Founding member of OpenAI and former director of AI at Tesla; creator of nanoGPT and the term "vibe coding".
Farzapedia, personal wikipedia of Farza, good example following my Wiki LLM tweet. I really like this approach to personalization in a number of ways, compared to "status quo" of an AI that allegedly gets better the more you use it or something: 1. Explicit. The memory artifact is explicit and navigable (the wiki), you can see exactly what the AI does and does not know and you can inspect and manage this artifact, even if you don't do the direct text writing (the LLM does). The knowledge of you is not implicit and unknown, it's explicit and viewable. 2. Yours. Your data is yours, on your loca… Quoting @FarzaTV This is Farzapedia. I had an LLM take 2,500 entries from my diary, Apple Notes, and some iMessage convos to create a personal Wikipedia for me. It made 400 detailed articles for my friends, my startups, research areas, and even my favorite animes and their impact on me complete with backlinks. But,… LLMs Related
9 February
French software engineer, public speaker and fully remote nomadic worker; writes about frontend development at maxpou.fr.
Their words
My main browser is Brave. I also use the following extensions:
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maxpou.fr
7 January
Executive coach for product leaders. Previously a partner at GV (Google Ventures) and a product manager at Google. Writes at Bring the Donuts, including a standing essential-reading list for product managers.
Their words
Soon after this book was published Allen attracted an almost cult-like following. The fundamental ideas remain sound. Product managers juggle hundreds of priorities, and this book will help you balance your time.
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bringthedonuts.com
28 December 2025
Novelist, author of twelve books including Foundry, Bandwidth and Cumulus. Sends a newsletter of monthly book recommendations.
Their words
Trust by Hernan Diaz is an onion of a novel in which every chapter peels back a layer to reveal yet more beneath. Following the meteoric rise of a Wall Street financier in the early 20th century, the intricately plotted story will seduce you, transport you, stimulate you, mislead you, and, ultimately, move you.
Show the whole quote
eliotpeper.substack.com
15 December 2025
American author of Liar's Poker, Moneyball, The Big Short and The Undoing Project, and host of the podcast Against the Rules.
9 December 2025
Vice chairman of Ogilvy & Mather Group, the advertising agency; author of Alchemy (2019) and the Wiki Man columnist at The Spectator.
government
Their words
And there are a whole bunch of people who are employed not always by the government just as much by the private sector who are much more interested in adherence to uh approved procedure than they are in quality of outcome.
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youtube.com
26 August 2025
Mac and iOS developer at the Iconfactory, where he has worked on apps including Twitterrific and Tot. He writes about development at furbo.org.
3 June 2025
Deep-learning researcher and Turing Award laureate; founder of the Mila institute.
14 May 2025
Founded CD Baby in 1998 and sold it in 2008, giving the proceeds to a charitable trust for music education. Since then a writer and speaker: five books and 550+ articles, published first at sive.rs, which they hand-code and keep free of advertising.
Their words
So the idea is when you start a business, you get to make all the rules now. You can, like in this little part of the world, you get to decide how things should work. You don't have to follow norms.
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sive.rs
7 February 2025
American travel writer and broadcaster. Runs Rick Steves' Europe and writes the guidebooks, packing advice and travel-tip articles published on ricksteves.com.
Their words
Use a sturdy journal designed to last a lifetime, rather than a floppy spiral notebook. A great brand with a cult following among travel writers is Moleskine.
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ricksteves.com
10 August 2024
Founder of the toy manufacturer Viahart; writes about manufacturing, importing and why bringing production back to America is harder than it sounds.
29 June 2024
Gwern Recommends 29 Jun 2024
Pseudonymous essayist. Writes at gwern.net on AI scaling, statistics, genetics and long-running internet research, with heavy citation and a habit of revising old essays in place rather than leaving them wrong.
Their words
Thoroughly enjoyable, stuffed with beautiful shots of Istanbul and cats, with particularly clever ankle-level tracking shots following the semi-feral cats around.
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gwern.net
19 June 2024
Co-founder and CEO of Perplexity, an AI answer engine; previously a research scientist at OpenAI and a PhD student at UC Berkeley.
Their words
So most people, when they advertise new context window increase, they talk a lot about finding the needle in the haystack sort of evaluation metrics and less about whether there’s any degradation in the instruction following performance. So I think that’s where you need to make sure that throwing more information at a model doesn’t actually make it more confused.
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youtube.com
8 May 2024
Game designer and director of the NYU Game Center; made Universal Paperclips and writes Donkeyspace.
25 April 2024
Professor at Carnegie Mellon working on self-driving-car safety; writes Safe Autonomy on how autonomous vehicles are and are not shown to be safe.
3 February 2024
Pen name of the Canadian-American writer behind mrmoneymustache.com, a blog on frugality, early retirement and index-fund investing that has run since 2011.
How To Afford a House These Days The other day, an MMM reader stopped by and left the following comment on one of my older posts about the principles of FIRE: As with every critique of our ideas, I thought about this comment for a while. Tried to deter…
Related
16 January 2024
Engineer and writer on machine-learning systems; author of Designing Machine Learning Systems and AI Engineering. "I work to bring AI into production. I write about AI system design."
Their words
I suspect that in the future, it'll be easier to get models to output exactly what we need with minimal prompting, and these techniques will become less important.
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huyenchip.com
24 October 2023
Writes Don't Worry About the Vase, a near-daily account of what is happening in AI and what they think it means. Former Magic: the Gathering pro and trader; unusually willing to put a number on a belief and to grade their own past calls.
Their words
Going Infinite is awesome. I would have been happy with my decision on the basis of any one of the following:
Show the whole quote
thezvi.substack.com
6 August 2022
Co-founded Neuralink and founded Science Corp, which is building a retinal implant; writes about neural interfaces and biology.
How do we know anything? Consider the following mathematical idea: A function $f(x)$ is smooth and continuous (i.e., it is differentiable everywhere) At some point $x_1$ the slope of $f$ is negative, $f’(x_1) < 0$ At some other point $x_2 > x_1…
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4 March 2022
Alignment researcher at Anthropic; co-led OpenAI's superalignment team until 2024, and writes Musings on the Alignment Problem.
From one piece
Training language models to follow instructions with human feedback (with 19 co-authors)
2 beliefs, in the piece's order there
Their words
Making language models bigger does not inherently make them better at following a user's intent.
Show the whole quote
arxiv.org
AI alignment
Their words
This is because the language modeling objective used for many recent large LMs-predicting the next token on a webpage from the internet-is different from the objective "follow the user's instructions helpfully and safely" (Radford et al.,, 2019; Brown et al.,, 2020; Fedus et al.,, 2021; Rae et al.,, 2021; Thoppilan et al.,, 2022). Thus, we say that the language modeling objective is misaligned.
Show the whole quote
arxiv.org
3 January 2022
Researcher on distributed systems and local-first software at the University of Cambridge; wrote Designing Data-Intensive Applications.
Book Review: The Future of Fusion Energy I give a five-star ⭐️⭐️⭐️⭐️⭐️ rating to the following book: Jason Parisi and Justin Ball. The Future of Fusion Energy. World Scientific, 2019. ISBN 978-1-78634-749-7. Available from Amazon US, Amazon UK, and many other…
energy Related
14 June 2021
Co-founder of Microsoft and of the Gates Foundation. Writes Gates Notes on global health, energy and climate, and on whatever they have been reading.
Their words
On the contrary, I loved following Powers’ characters as they became more and more passionate about their love for trees.
Show the whole quote
gatesnotes.com
30 December 2020
Co-founded Neuralink and founded Science Corp, which is building a retinal implant; writes about neural interfaces and biology.
What does Twitter asymptote to? Consider the following interpretation of Twitter: Twitter is a process that is applied to a human thought vector $x$, a time $t$, and a state vector $c_{t-1}$ which emits a value $tweet$ and a new state vector $c_{t}$.…
Related
2 December 2020
Researcher on distributed systems and local-first software at the University of Cambridge; wrote Designing Data-Intensive Applications.
5 November 2019
Creator of the Keras deep-learning library and the ARC-AGI benchmark.
13 April 2018
Software engineer; co-founder and former CTO of Tailscale, previously on the Go team at Google.
Service Throughput Tradeoffs 2018-04-13, David Crawshaw I am currently writing a service that lets users upload files. The typical file size is about 25KB, the maximum is 100MB, with file sizes following a power-law distribution. The nature of the…
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24 January 2018
Creator of the Zig programming language; president and lead developer of the Zig Software Foundation.
Unsafe Zig is Safer Than Unsafe Rust Consider the following Rust code: struct Foo { a: i32, b: i32, } fn main() { unsafe { let mut array: [u8; 1024] = [1; 1024]; let foo = std::mem::transmute::(&mut array[0]); foo.a += 1; } } This pattern is pretty common…
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A korrent is a belief a person has stated in their own words: one
sentence stating the claim, backed by a quote and a source, kept at
korrents.com .
Under a name here, the quoted block is what they actually said.
The korrent beneath it is the claim those words support, in
korrents' wording — tap it to see the record, its source, and who
else holds it.
Nobody here wrote their own korrents. They are compiled from public
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About the English under a post
Some people here publish in a language other than English. Where they
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this typeface — the site's own, not theirs.
The post itself is never changed, moved or hidden: what is set in the
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Only the post's own words are translated. A quoted post, a linked
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