Yeah, RAG can't provide such guarantees. Moreover, even if the correct answer is printed somewhere, LLM+RAG still may produce wrong answer. Example from MS Copilot with GPT-4: https://sl.bing.net/ct6wwRjzkPc
It claims that OnePlus 6 has 6.4-inch display, but all linked pages actually claim that it's 6.28. Display resolution and aspect ratio are also wrong in the response.
