Comment by OutOfHere
When the RAG sees retrieved facts, it should see the timestamp for each. It will easily then use the latest fact if there aren't too many conflicting ones. I am assuming that the relevance ordering of the retrieved facts won't help.
Separating a RAG from a memory system, it is important for a memory system to be able to consolidate facts. Any decent memory system will have this feature. In our brain we even have an eight hour sleep window where memory consolidation can happen based on simulated queries via dreams.