> I don’t know if this is feasible or not, but having the chat bot also be able to respond with a subset of sources that it based its answer on would be a satisfying combination of both worlds I think.

But an LLM doesn’t look at particular sources, find relevant ones, and write a response based on them, it is a mathematical summation of the way all of its sources look as sequences of text, and produces a response that based on that fits with its prompt. Identifying which sources most influence a response isn’t merely something that they don’t currently do, its information that, AFAIK, there is no plausible way to recover from the model.

After I commented I did do a little bit of thinking about the little that I know about this subject and realized that it probably isn't feasible to extract that data. Thanks for the comment because... you are right as far as I know. It is a bit disappointing to realize this though.