[Escapade5160]

Am I correct in my understanding that they are not actually able to 100% know what Claude is thinking? They have trained a new model to make a guess about what Claude is thinking, but we cannot validate that the guess is 100% valid, right? They are basically saying "we have trained a model to reaffirm what we believe Claude is thinking" ? Hoping I'm wrong in my understanding of this because this does not appear to be good research to me.

[kovek]

Maybe you can't 100% know what every layer "thinks", if you go through all the layers, you might see a cohesive "thinking" story. So, if there is any information you lose at layer N, you might learn some of it in layer N+1. The masking in the layers is not deterministic so the model can't really consistently lie throughout the layers. It doesn't chose what information we get to inspect. There might be a game of whack-a-mole, but you might get a general sentiment. I think the more layers there are, the more the model itself can hide very nuanced lies (But by that time we'd have a better mind-reading model).

However, I haven't read about it yet. I'm really excited to look into it!

[red75prime]

> "we have trained a model to reaffirm what we believe Claude is thinking" ?

It's more like "We have trained a model to produce a text that allows reconstruction of activations and the text happened to coincide with the results of other interpretability methods even after extensive training, while we expected it to devolve into unintelligible mess."

They found something unexpected and useful. They report it, while outlining limitations and ways to improve. It looks like a fine research to me.