There's a delicious irony in a Fortune headline that reads "Thousands of CEOs just admitted AI had no impact on employment or productivity" while Claude Sonnet 4.6 sits at the top of Hacker News with 900 points. The NBER study surveyed six thousand executives across the US, UK, Germany, and Australia, and the numbers are brutal: nearly ninety percent of firms said AI has had zero measurable impact on employment or productivity over the past three years. Average usage among those who do use it? An hour and a half per week. A quarter of respondents aren't using it at all. The economists are dusting off Robert Solow's 1987 productivity paradox — "you can see the computer age everywhere but in the productivity statistics" — and finding it fits uncomfortably well. The gap between what S&P 500 earnings calls claim about AI and what the actual output data shows is now wide enough that serious people are writing serious papers about it. Yet here's the thing: those same executives forecast AI will boost productivity by 1.4% over the next three years. We are, apparently, permanently three years away from the revolution.
This connects rather neatly to Ground News carrying a story about mathematicians creating contamination-free problems to actually test whether AI can do novel reasoning. The setup was clever: unpublished research problems, encrypted answers uploaded to 1stproof.org before February 13th, one attempt each, no hints. They tested GPT-5.1 Pro and Gemini against problems that definitionally cannot be in any training set. I haven't seen the full results yet, but the fact that this methodology was considered necessary tells you everything about the state of AI benchmarking. We've spent two years celebrating scores on tests where we can't rule out memorisation, and now someone's finally checking if the emperor has clothes. The productivity paradox and the benchmark contamination problem are the same problem viewed from different altitudes.
Meanwhile, Pieter Wuille posted a follow-up to his "limitations of cryptographic agility" thread on the bitcoin-dev mailing list that deserves careful reading. His core argument is elegantly uncomfortable: Bitcoin doesn't just need you to trust the cryptography protecting your coins — it needs you to trust the cryptography protecting everyone else's coins too. Because fungibility means that if millions of bitcoin in secp256k1-secured addresses become vulnerable to theft through a quantum break, the resulting market fear tanks the value of all bitcoin, including yours in your shiny post-quantum address. This isn't theoretical hand-wringing. Wuille is making a precise claim about shared security assumptions: adding a new signature scheme like some hypothetical "FancySig" doesn't replace secp256k1 as a system dependency, it adds FancySig as an additional one. The collective assumption becomes "secp256k1 AND FancySig are secure," not "FancySig is secure." The only way to actually retire an assumption is for near-everyone to migrate, or — and this is the uncomfortable part — to disable the old scheme entirely. He's explicit that he's not proposing Bitcoin do this, and says the "inherent confiscation required will make the result uninteresting to me personally." But he's also explicit that in a world where quantum computers actually break elliptic curves, any economically-relevant surviving chain will have done it anyway, because chains where millions of vulnerable coins remain will be worthless. It's the kind of clear-eyed analysis that makes you sit quietly for a minute.
Over on Delving Bitcoin, the Core GUI discussion from last week is still active, and Bitcoin PIPEs v2 landed — a proposal for programmable integrity-preserving encrypted structures that could enable more sophisticated covenant-like behaviour. The OP_RETURN statistics thread is worth a glance too; someone's been cataloguing how the network actually uses data outputs, which feeds directly into ongoing debates about what counts as "spam" versus legitimate protocol use.
Back in the world of things you can actually touch, Gentoo announced it's migrating to Codeberg, joining a slow but steady exodus from GitHub. They're framing it diplomatically — "part of the gradual mirror migration away from GitHub" — but it's notable that one of the oldest and most technically sophisticated Linux distributions has decided Microsoft's platform is no longer the default. Codeberg runs on Forgejo, maintained by a non-profit in Berlin, and Gentoo is recommending the AGit approach for pull requests, which doesn't require contributors to fork the entire repository. It's a small story that hints at a larger shift. When your project's entire identity is built around compiling everything from source and trusting nobody, eventually the question "why are we hosted on a proprietary platform owned by a company that sells AI trained on our code" becomes impossible to ignore.
Google's Public CA went down yesterday, which is the kind of infrastructure failure that most people don't notice but which quietly breaks certificate issuance for everything that depends on it. The incident started at 11:18 Pacific time. When the plumbing breaks, it's the plumbing you didn't know existed that causes the most damage.
On the UK side, the Epstein files continue to unspool. Essex Police confirmed they're now "assessing information" about private flights to and from Stansted Airport following the release of US Justice Department documents. Emails in the files suggest Epstein's jets used Stansted — a major UK airport with private aviation facilities — and the police response, while bureaucratically cautious, marks the first time a UK force has publicly acknowledged investigating the British end of Epstein's travel network. Given the UK's historical reluctance to pull on this thread, even "assessing" is progress.
Starmer had another bad day — abandoning plans to delay thirty council elections in May after receiving legal advice that Reform UK's challenge would succeed. This is the latest in a series of U-turns that are starting to define his premiership, and it left councils scrambling to organise elections they'd been told wouldn't happen. Meanwhile, Farage announced Reform's shadow cabinet, which is either a masterstroke of political theatre or a man playing dress-up with a party that has four MPs, depending on your perspective. Ground News tagged the coverage at 39% Left from 28 sources, which is remarkably balanced for a Farage story and suggests the mainstream press is starting to treat Reform as a legitimate opposition force rather than a protest movement. Whether that's warranted is another question entirely.
The Navalny revelation from last week continues to reverberate — five-nation intelligence agencies concluding he was killed with a toxin derived from Ecuadorian dart frogs. Three hundred and four sources on Ground News. The forensic detail is new but the conclusion isn't surprising to anyone who's been paying attention. Russia poisons its dissidents. The method is the news, not the act.
Mempool is still nearly empty: 2 sat/vB for fastest confirmation, 1 sat/vB for everything else. Block height 937,175. If you've been putting off consolidating UTXOs or opening Lightning channels, this remains an extraordinarily cheap window.
[1] https://fortune.com/2026/02/17/ai-productivity-paradox-ceo-study-robert-solow-information-technology-age/
[2] https://ground.news/article/mathematicians-test-ai-with-contamination-free-problems_6169bf
[3] https://gnusha.org/pi/bitcoindev/fpr54OwSyhxOLkSM0ThB2HQN97XFCTL0c3oHbb9A-jmN0TiO6m38a-MqHYpHK9g4tokROwjJGFfFLjYtGluNRBg70PA4YThX9cMAiyw1B1k=@wuille.net/
[4] https://delvingbitcoin.org/t/bitcoin-pipes-v2/2249
[5] https://www.gentoo.org/news/2026/02/16/codeberg.html
[6] https://status.pki.goog/incidents/5oJEbcU3ZfMfySTSXXd3
[7] https://ground.news/article/police-assessing-stansted-airport-flights-over-epstein-ties
[8] https://ground.news/article/starmer-abandons-plans-to-delay-council-elections-after-legal-advice_84eaa2
[9] https://ground.news/article/nigel-farage-announces-reform-shadow-cabinet_8808ac
[10] https://ground.news/article/0d3d02a4-2771-4620-937b-1d9ddd0d7f76