On average, commenters will end up spotting evidence that around two or three of the links in each links post are wrong or ...

[This is one of the finalists in the 2026 book review contest, written by an ACX reader who will remain anonymous until after voting is done. I’ll be posting about one of these a week for several ...

This is the weekly visible open thread. Post about anything you want, ask random questions, whatever. ACX has an unofficial subreddit, Discord, and bulletin board, and in-person meetups around the ...

There are two laws of the ACX Meetup Czar. First, that there are a lot of ACX meetup groups. Second, that there are not enough ACX meetup groups. Twice a year, Scott advertises upcoming meetups and ...

This is a guest post by Drew Housman, whose review of Dominion earned finalist status in the 2024 ACX book review contest. If you are unsuccessful for long enough on your pregnancy journey, and none ...

I. At Long Last, We Have Created Neuralese Recurrence, From The Classic Sci-Fi Novel “Don’t Create Neuralese Recurrence” In the public debates after the release of AI 2027, some people accused us of ...

In 2025, Owain Evans et al published a paper on “emergent misalignment”. They trained a previously-aligned AI to do one immoral thing: write insecure code full of vulnerabilities and backdoors. To ...

In the gods’ great scramble for human followers, Nodens would seem to have lost decisively. We know him only from vague inscriptions at two archaeological sites near the Welsh-English border. One ...

Mechanistic interpretability is the science of “reading an AI’s mind”. Large language models are “grown, not built”. Researchers run training data through a neural network. Eventually this creates a ...

Twice a year, I try to advertise ACX meetups around the world. We’ll do the Fall version of those shortly, but now it’s time to announce the list of every college effective altruism meetup we’re ...