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Typechecker Zoo

This is a pet project of mine I’ve been working on for a while. We’re going to create minimal implementations of the most successful static type systems of the last 50 years. This will involve making toy implementations of programming languages and the core typechecking algorithms. These obviously have evolved a lot over the years, so we’ll start with the simple ones and proceed all the way up to modern dependent types. Basically a fun romp through half a century of programming language design.

Class-action suit claims Otter AI records private work conversations

Class-action suit claims Otter AI secretly records private work conversations toggle caption Source: Otter A federal lawsuit seeking class-action status accuses Otter.ai of "deceptively and surreptitiously" recording private conversations that the tech company uses to train its popular transcription service without permission from the people using it. The company's AI-powered transcription service called Otter Notebook, which can do real-time transcriptions of Zoom, Google Meet and Microsoft

Grammarly says its AI agent can predict an A paper

Posts from this author will be added to your daily email digest and your homepage feed. Grammarly is launching several new AI agents for specific writing challenges, from educators trying to detect plagiarism and AI-generated text to students looking to gauge reader reaction to their paper, needing help with citations, and even seeing their predicted grade. The specialized AI agents are available in docs — which is Grammarly’s new “AI-native writing surface,” according to the company’s press re

Pixel Watch running slow? Do this to instantly improve the performance

Kyle Kucharski/ZDNET ZDNET's key takeaways A restart fixes freezes, errors, and update issues. A reset clears all data to fix major glitches. Use restart first, reset only as a last resort. Get more in-depth ZDNET tech coverage: Add us as a preferred Google source on Chrome and Chromium browsers. Like every other piece of tech, our smartwatches can get sluggish after continual use. Maybe you're waiting several seconds for your smartwatch to load functionalities, or you're experiencing anno

Show HN: I built an app to block Shorts and Reels

Block Reels & Shorts on Instagram, Facebook, Reddit, YouTube. Set scrolling limits on any app with antiscroll mode. No Ads, No Reels, No Shorts, No Distractions. iOS has some limitations,so it’s not technically possible to block Reels and Shorts the same way as on Android. Although it can't be done the same way, I’m building an iPhone app with a different approach to help cut down on scrolling addiction. Drop your email and I’ll let you know when is launched!

Liver King Accused of Breaking Blood-Bound Contract He Insisted Upon

Liver King, the very red gentleman who receives what is perhaps the most liberal interpretation of the title “health and fitness influencer,” is in the middle of what can mostly be described as an extremely petty and deeply stupid lawsuit over a supplement. And while the case itself might not be super noteworthy simply because the guy has been in court a lot lately, it has produced this incredible detail: The Liver King had his partners sign a contract in blood. According to a complaint filed b

This Anker 3-in-1 wireless charging station is on sale for 30 percent off

Anker's 3-in-1 MagSafe charging station is on sale for a record low price of $63 — that works out to savings of 30 percent.The Qi2-certified charger wirelessly charges your compatible iPhone, Apple Watch, and AirPods on one compact and convenient dock. Qi2 boasts 15W of power, so you can take advantage of fast charging on compatible devices. This means the station can charge an iPhone 16 Pro Max to 20 percent in just 20 minutes and an Apple Watch Series 10 from zero to 100 percent in just over

The circular economy could make demolition a thing of the past

Most of us are already quite comfortable recycling our household waste. In Spain, for instance, millions of tonnes of packaging are processed every year, but did you know that buildings and their materials can also be recycled, or that an entire building could be completely dismantled and reassembled? Formula 1, often a laboratory for innovation, offers us a real-world example of this in the form of the Red Bull team’s “pit box”, known as the F1Holzhaus – literally, “the wooden house”. It made

LLMs and coding agents are a security nightmare

Last October, I wrote an essay called “When it comes to security, LLMs are like Swiss cheese — and that’s going to cause huge problems” warning that “The more people use LLMs, the more trouble we are going to be in”. Until last week, when I went to Black Hat Las Vegas, I had no earthly idea how serious the problems were. There, I got to know Nathan Hamiel, a Senior Director of Research at Kudelski Security and the AI, ML, and Data Science track lead for Black Hat, and also sat in on a talk by tw

It's the Housing, Stupid

A few weeks ago, I was on The Compound and Friends, and there was a debate about why we were seeing 2021-like meme stock activity and money market funds holding record assets at the same time. For context, both of these things are true. If we look at the performance of the 100 most shorted stocks compared to the Russell 1000, that performance spread is nearing 2021 levels: It’s like a bunch of mini GameStop short squeezes all over again. And if we look at the non-profitable tech retail invest

9 Picks of the Best Gaming Mouse, Tested and Reviewed (2025)

Other Good Mice to Consider NZXT Lift 2 Symm Photograph: Eric Ravenscraft NZXT Lift 2 Symm for $50: PC manufacturer NZXT has been venturing out into the peripherals market with impressive products for a company so relatively new to the game. The NZXT Lift 2 Symm is no exception. This mouse has a hollow interior and a base that uses minimal plastic. This gives it an ultra-lightweight feel, but avoids the odd feeling that other mice like the SteelSeries Aerox 3 give off by reducing the amount of

Why we should thank pigeons for our AI breakthroughs

People looking for precursors to artificial intelligence often point to science fiction by authors like Isaac Asimov or thought experiments like the Turing test. But an equally important, if surprising and less appreciated, forerunner is Skinner’s research with pigeons in the middle of the 20th century. Skinner believed that association—learning, through trial and error, to link an action with a punishment or reward—was the building block of every behavior, not just in pigeons but in all living

The best gaming monitors in 2025

If you want to get the most out of your games — whether you're into competitive FPS titles, sprawling RPGs or story-driven adventures — a good gaming monitor can make all the difference. Smooth gameplay, low input lag and crisp visuals are just the start. With the right screen, everything from your aim to your immersion gets a serious upgrade. These days, there’s a lot more to consider than just refresh rate or screen size. You’ll find ultrawide gaming monitors, widescreen displays, models wi

HR giant Workday discloses data breach after Salesforce attack

Human resources giant Workday has disclosed a data breach after attackers gained access to a third-party customer relationship management (CRM) platform in a recent social engineering attack. Headquartered in Pleasanton, California, Workday has over 19,300 employees in offices across North America, EMEA, and APJ. Workday's customer list comprises over 11,000 organizations across a diverse range of industries, including more than 60% of the Fortune 500 companies. As the company revealed in a Fr

Viking-Age hoard reveals trade between England and the Islamic World

A Viking-Age silver hoard unearthed in Bedale, North Yorkshire, is providing new insights into wealth and trading links between England and the Islamic World. First discovered in 2012 by a metal detectorist in a North Yorkshire field, the hoard (known as the Bedale hoard), consists of a deposit of necklaces, arm-bands, a sword pommel, hacksilver, and 29 silver ingots. - Advertisement - Previous studies have dated the hoard to the late 9th to early 10th centuries AD, predating both the nearby

LLMs and Coding Agents = Security Nightmare

Last October, I wrote an essay called “When it comes to security, LLMs are like Swiss cheese — and that’s going to cause huge problems” warning that “The more people use LLMs, the more trouble we are going to be in”. Until last week, when I went to Black Hat Las Vegas, I had no earthly idea how serious the problems were. There, I got to know Nathan Hamiel, a Senior Director of Research at Kudelski Security and the AI, ML, and Data Science track lead for Black Hat, and also sat in on a talk by tw

These Are the Biggest Mistakes Home Cooks Make, According to Professional Chefs

Cooking can be intimidating. The process of shopping, prepping, cooking and, ultimately, tasting the fruits of your labor taps into a side of the brain that not many people can or want to explore. But not even the pros get it right all the time, as the kitchen provides a safe space to experiment, fail and -- best of all -- learn so that desired outcomes can be improved upon and new recipes can be added to the ever-growing arsenal. That said, it certainly helps to identify some of the most comm

Ars Technica System Guide: Four sample PC builds, from $500 to $5,000

Sometimes I go longer than I intend without writing an updated version of our PC building guide. And while I could just claim to be too busy to spend hours on Newegg or Amazon or other sites digging through dozens of near-identical parts, the lack of updates usually correlates with "times when building a desktop PC is actually a pain in the ass." Through most of 2025, fluctuating and inflated graphics card pricing and limited availability have once again conspired to make a normally fun hobby a

The End of Handwriting

People often credit my good handwriting to my Catholic school education—like a nun with a ruler and a taste for corporal punishment perfected my penmanship. But that’s not why. It’s because of my mom. An engineer by trade, she can execute the kind of perfect block letters that only come with years of working on a drawing board. As a kid, I worked to mimic her print as well as her incredibly ornate cursive. I don’t practice those skills nearly enough as an adult, though: As a reporter, speed trum

HR giant Workday discloses data breach amid Salesforce attacks

Human resources giant Workday has disclosed a data breach after attackers gained access to a third-party customer relationship management (CRM) platform in a recent social engineering attack. Headquartered in Pleasanton, California, Workday has over 19,300 employees in offices across North America, EMEA, and APJ. Workday's customer list comprises over 11,000 organizations across a diverse range of industries, including more than 60% of the Fortune 500 companies. As the company revealed in a Fr

Ultrahuman brings advanced cycle and ovulation tracking to its smart ring

ZDNET's key takeaways Ultrahuman Ring Air users can get paid-for cycle tracking features. Cycle and Ovulation Pro launched on Friday. The tool enables people with irregular menstrual cycles to track their periods accurately. Get more in-depth ZDNET tech coverage: Add us as a preferred Google source on Chrome and Chromium browsers. Ultrahuman Ring Air users are getting new, advanced ways to track their menstrual cycle, as the smart ring and wearable health brand launched Cycle and Ovulation

Nvidia Tilus: A Tile-Level GPU Kernel Programming Language

Tilus: A Tile-Level GPU Kernel Programming Language Documentation | Paper Tilus is a powerful domain-specific language (DSL) for GPU programming that offers: Thread-block-level granularity with tensors as the primary data type. with as the primary data type. Explicit control over shared memory and register tensors (unlike Triton). over shared memory and register tensors (unlike Triton). Low-precision types with arbitrary bit-widths (1 to 8 bits). It also includes automatic tuning, caching,

Best Teeth Whitening Kits You Should Check Out In 2025

Teeth whitening kits aren't exactly what most people would call riveting. I must say I was blown away by the entire Smile Brilliant process and package. I wasn't aware you could get custom-fitted whitening trays anywhere other than a dentist's office, but you can with Smile Brilliant. Wearing these whitening trays is just like wearing a retainer. They fit perfectly to your teeth because they're designed using putty impressions you make of your teeth. The process works like this: You order a kit

Why Nim?

You might have heard of the line, "one ring to rule them all" from the book the Lord of the Rings. Though, this ring is an evil object created by the evil Sauron, the idea of just one thing existing to manage or control a lot of things at the same time, is something we all long for. We all need that one app which can manage all our tasks. We need that one card that can hold or manage all our credit and debit card information. How we long for a single language for the whole world (by the way thi

The Enterprise Experience

The Enterprise Experience It's the 18th of August. Today is a special day for me, as it marks my one-year anniversary of working at $ENTERPRISE. Before this I had been a professional software developer for the best part of a decade, but entirely in startups and SMEs. This time last year I made the decision to sell out and hit the big leagues for fun and financial profit. After my interview the only feedback I received was that I didn't have much exposure to enterprise software development, whi

‘Stranger Things’ creators may be leaving Netflix

Netflix could soon lose the creative team behind one of its biggest hits. Earlier this week, Variety and other Hollywood publications reported that Matt and Ross Duffer, the brothers who created “Stranger Things” (and wrote and directed many episodes), were in talks to sign an exclusive deal with Paramount (now under the ownership of David Ellison’s Skydance). Then on Friday evening, Puck’s Matthew Belloni posted that the Duffers had in fact “made their choice” and were going to Paramount. The

This open-source fasting app actually helped me hit my fitness goals

Dhruv Bhutani / Android Authority I was never an athletic kid, and that continued through most of my 20s. That is, until I decided to change things up, drop some weight, and focus more on my health. Intermittent fasting was a big part of that journey, and I’ve been following it for several years now. In fact, it’s the one constant in my wellness journey that has actually stuck with me. Much as I’ve dabbled with workout plans, picked up the best fitness trackers, tracked macros with obsessive de

Changing these 12 settings on my Android phone extended its battery life by hours

Kerry Wan/ZDNET Get more in-depth ZDNET tech coverage: Add us as a preferred Google source on Chrome and Chromium browsers. I've spent large portions of my life looking for ways to extend the battery life on my Android phones. Admittedly, that sounds rather dramatic, but growing up with only budget models meant I was constantly tweaking device settings to squeeze every bit of juice out of their batteries. Thanks to this micromanaging, I successfully pushed the batteries on all my past smartph

How you're charging your tablet is quietly killing it - 3 mistakes to avoid (and the right way)

Kerry Wan/ZDNET ZDNET's key takeaways Unplug at 100%, keep battery between 20% and 80%. Avoid draining to 0%; store unused tablets at 50%. Use certified chargers to prevent stress and overheating. Get more in-depth ZDNET tech coverage: Add us as a preferred Google source on Chrome and Chromium browsers. As someone who uses a tablet daily, I'm constantly looking for ways to make its battery last longer. However, some habits you don't think twice about could actually be hurting your battery