I think KL/entropy regularization is usually used to prevent mode collapse partly because it has nice theoretical properties. In particular, it is easy to reason about the optimal policy for the regularized objective - see for example the analysis in the paper Equivalence Between Policy Gradients and Soft Q-Learning.
Nevertheless, action-dependent baselines do appear in the literature, although the story is a bit confusing. This is my understanding of it from some old notes:
I think the direction depends on what your expectations were – I'll try to explain.
First, some terminology: the term "horizon length" is used in the paper to refer to the number of timesteps over which the algorithm pays attention to rewards, as governed by the discount rate. In the biological anchors framework, the term "effective horizon length" is used to refer to a multiplier on the number of samples required to train the model, which is influenced by the horizon length and other factors. For clarity, I'll using the term "scaling multiplier" instead of "effective horizon length" in this comment. The paper studies the effect of the horizon length on the scaling multiplier in a toy MNIST setting.
One key takeaway is that the scaling multiplier is not simply proportional to the horizon length, as one might have naively expected. Instead, the number of samples required is the sum of two components, one that is inherent to the task and independent of the horizon length, and one that is proportional to the horizon length. Compared to the naive expectation, this means that training compute requirements are lower. On the other hand, this ignores reward sparsity, so you might expect training compute requirements to be higher once both horizon length and reward sparsity are accounted for.
The paper also lends some support to the modeling assumptions of the neural network anchor, by validating the hypotheses that (a) training compute requirements still scale as a power law in model size for reinforcement learning, and with a similar exponent, and (b) the scaling multiplier can indeed vary a lot between environments. This might make you put more weight on the neural network anchor, which could again have either directional effect.
The other takeaways are more methodological and I don't think have much of a directional effect.
Agreed. Likewise, in a transformer, the token dimension should maintain some relationship with the input and output tokens. This is sometimes taken for granted, but it is a good example of the data preferring a coordinate system. My remark that you quoted only really applies to the channel dimension, across which layers typically scramble everything.
The notion of a preferred (linear) transformation for interpretability has been called a "privileged basis" in the mechanistic interpretability literature. See for example Softmax Linear Units, where the idea is discussed at length.
In practice, the typical reason to expect a privileged basis is in fact SGD – or more precisely, the choice of architecture. Specifically, activation functions such as ReLU often privilege the standard basis. I would not generally expect the data or the initialization to privilege any basis beyond the start of the network or the start of training. The data may itself have a privileged basis, but this should be lost as soon as the first linear layer is reached. The initialization is usually Gaussian and hence isotropic anyway, but if it did have a privileged basis I would also expect this to be quickly lost without some other reason to hold onto it.
For people viewing on the Alignment Forum, there is a separate thread on this question here. (Edit: my link to LessWrong is automatically converted to an Alignment Forum link, you will have to navigate there yourself.)
Without commenting on the specifics, I have edited to the post to mitigate potential confusion: "this fact alone is not intended to provide a complete picture of the Anthropic split, which is more complicated than I am able to explain here".
I was the project lead on WebGPT and my motivation was to explore ideas for scalable oversight and truthfulness (some further explanation is given here).
It includes the people working on the kinds of projects I listed under the first misconception. It does not include people working on things like the mitigation you linked to. OpenAI distinguishes internally between research staff (who do ML and policy research) and applied staff (who work on commercial activities), and my numbers count only the former.
I don't think I understand your question about Y-problems, since it seems to depend entirely on how specific something can be and still count as a "problem". Obviously there is already experimental evidence that informs predictions about existential risk from AI in general, but we will get no experimental evidence of any exact situation that occurs beforehand. My claim was more of a vague impression about how OpenAI leadership and John tend to respond to different kinds of evidence in general, and I do not hold it strongly.