[oersted]

That’s a very good point. I just speak from my experience of fine-tuning pre-trained models. At least at that stage they can memorize new knowledge, that couldn’t have been in the training data, just by seeing it once during fine-tuning (one epoch), which seems magical. Most instruction-tuning datasets are also remarkably small (very roughly <100K samples). This is only possible if the model has internalized the knowledge quite deeply and generally, such that new knowledge is a tiny gradient update on top of existing expectations.

But yes I see what you mean, they are dumping practically the whole internet at it, it’s not unreasonable to think that it has memorized a massive proportion of common question types the user might come up with, such that minimal generalization is needed.

[godelski]

  > that couldn’t have been in the training data

I'm curious, how do you know this? I'm not doubting, but is it falsifiable?

I also am not going to claim that LLMs only perform recall. They fit functions in a continuous manner. Even if the data is discrete. So they can do more. The question is more about how much more.

Another important point is that out of distribution doesn't mean "not in training". This is sometimes conflated, but if it were true then that's a test set lol. OOD means not belonging to the same distribution. Though that's a bit complicated, especially when dealing with high dimensional data