Understand why LLM knowledge seems to be used in chats for questions that should be unanswerable

[helenCNode]

If you ask "How do you boil an egg" as the first question the response is: "I was not able to answer that question".

If you ask a question which the RAG system can answer THEN ask "How do you boil an egg", SOMETIMES (but not every time), you will get a full response which is obviously using LLM knowledge rather than information from any contexts. Nesta sources will be cited which are obviously not relevant.