A question to the author. Can you perform an ablation study with respect to the chunks? In other words, if you put in the context irrelevant/random chunks from the document would the quality of answers decrease/stay similar?
Potential issue might be that chunks just serve to activate massive knowledge of GPT4 and not actually used as a basis for an answer. For example, GPT4 has surely seen Dune in its training corpus and could be answering from memory.