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LAUSD teacher and service worker unions announce massive April 14 strike if no deal reached

Los Angeles Times

Things to Do in L.A. Tap to enable a layout that focuses on the article. Teachers, union members, attend a rally at Molina Grand Park in Los Angeles on Wednesday. United Teachers Los Angeles and Local 99 service workers announced members would strike on April 14, if no deal is reached before then. This is read by an automated voice. Please report any issues or inconsistencies here .


Theoretical Foundations of Latent Posterior Factors: Formal Guarantees for Multi-Evidence Reasoning

arXiv.org Machine Learning

We present a complete theoretical characterization of Latent Posterior Factors (LPF), a principled framework for aggregating multiple heterogeneous evidence items in probabilistic prediction tasks. Multi-evidence reasoning arises pervasively in high-stakes domains including healthcare diagnosis, financial risk assessment, legal case analysis, and regulatory compliance, yet existing approaches either lack formal guarantees or fail to handle multi-evidence scenarios architecturally. LPF encodes each evidence item into a Gaussian latent posterior via a variational autoencoder, converting posteriors to soft factors through Monte Carlo marginalization, and aggregating factors via exact Sum-Product Network inference (LPF-SPN) or a learned neural aggregator (LPF-Learned). We prove seven formal guarantees spanning the key desiderata for trustworthy AI: Calibration Preservation (ECE <= epsilon + C/sqrt(K_eff)); Monte Carlo Error decaying as O(1/sqrt(M)); a non-vacuous PAC-Bayes bound with train-test gap of 0.0085 at N=4200; operation within 1.12x of the information-theoretic lower bound; graceful degradation as O(epsilon*delta*sqrt(K)) under corruption, maintaining 88% performance with half of evidence adversarially replaced; O(1/sqrt(K)) calibration decay with R^2=0.849; and exact epistemic-aleatoric uncertainty decomposition with error below 0.002%. All theorems are empirically validated on controlled datasets spanning up to 4,200 training examples. Our theoretical framework establishes LPF as a foundation for trustworthy multi-evidence AI in safety-critical applications.


The success of machine mathematicians shows us how to be OK with AI

New Scientist

Many people who try using AI are disappointed with the results and feel they can't trust a machine - but are there lessons we can learn from how AI is taking on mathematics? Have you ever received an email and had a sneaking suspicion it was written by AI, rather than lovingly handcrafted? Mathematicians have been wrestling with similar feelings for half a century, and have some lessons for the rest of us. It all began in 1976, when Kenneth Appel and Wolfgang Haken announced a proof of the four colour theorem, which states it takes a maximum of four shades to colour any map so that no two adjacent regions match. The theorem's simplicity meant mathematicians were expecting an elegant proof revealing a greater mathematical truth. Instead, they got 60,000 lines of impenetrable computer code.


UK reverses course on AI copyright position after backlash

Engadget

Sir Paul McCartney was among the artists who spoke out on the issue. After significant backlash, the UK backed off from that position. We have listened, Technology Secretary Liz Kendall said on Wednesday. However, the government's new stance is, well, not a stance at all. It currently no longer has a preferred option about how to handle the issue.


Why an up-and-coming indie developer is returning Microsoft's money

The Guardian

'Making people feel powerful' All Will Rise. 'Making people feel powerful' All Will Rise. Why an up-and-coming indie developer is returning Microsoft's money Don't get Pushing Buttons delivered to your inbox? V ideo games are in a funding crisis. Investor money flowed freely during the pandemic gaming boom, but now the well has run dry.


Boroux Versus Rorra Countertop Water Filters, Tested Head to Head

WIRED

In a world of plastic water filter pitchers, I tested two of the new generation of stainless-steel filter systems. I will admit that the popularity of those giant, stainless steel, gravity-fed water filters remained a mystery to me for some years--even as multi-gallon water filter systems from brands like British Berkefeld and Berkey seemed to proliferate equally among lovers of doomsday prepping and holistic wellness retreats. I have been testing much different breeds of water filters for more than a year now, including reverse osmosis filters and water pitchers. But often, the big water filter tanks have seemed as much like status symbols as functional items. If you see a big gravity-fed filter, you know the person in question is serious about wellness, survival, or both. What changed my mind about these big stainless steel filters was microplastics . Most water filter pitchers are made of BPA-free plastic. But as new research shows that bottled-water drinkers ingest tens of thousands of excess microplastic particles, wellness lovers have begun to look askance at water filters that are themselves made of plastic.


AI pilot program in L.A. County courts will help judges craft rulings in some cases

Los Angeles Times

Things to Do in L.A. Tap to enable a layout that focuses on the article. AI pilot program in L.A. County courts will help judges craft rulings in some cases This is read by an automated voice. Please report any issues or inconsistencies here . A select panel of L.A. County judges now have access to an artificial intelligence tool that can help them summarize motions and draft rulings in civil court. The tool, Learned Hand, is already in use by judges in 10 states, according to the company's CEO.


A principled approach for data bias mitigation

AIHub

How do you know if your data is fair? And if it isn't, what can you do about it? Machine learning models are increasingly used to make high-stakes decisions, from predicting who gets a loan to estimating the likelihood that someone will reoffend. But these models are only as good as the data they learn from [Shahbazi 2023]. If the training data is biased, the model's decisions will likely be biased too [Hort 2024, Pagano 2023].


Trump administration defends Anthropic blacklisting in US court

Al Jazeera

Has Trump failed to sell the Iran war to the world? Are US-Israeli attacks against Iran legal? The administration of United States President Donald Trump has said in a court filing that the Pentagon's blacklisting of Anthropic was justified and lawful, opposing the artificial intelligence company's high-stakes lawsuit challenging the decision. The administration made its comments in a court filing on Tuesday. The Trump administration's filing says Anthropic is unlikely to succeed in its claims that the US government's action violated speech protections under the US Constitution's First Amendment, asserting that the dispute stems from contract negotiations and national security concerns, not retaliation.


L.A. teachers union widely expected to announce strike date at massive Wednesday rally

Los Angeles Times

Things to Do in L.A. Tap to enable a layout that focuses on the article. L.A. teachers union widely expected to announce strike date at massive Wednesday rally Members of the largest unions representing teachers and nonteachers participate in joint rally at Grand Park in March 2023. The scene will be repeated on Wednesday, with union members once again on the verge of a strike. This is read by an automated voice. Please report any issues or inconsistencies here .