To make an admittedly bad metaphor, it's likely a lot of that knowledge has been moved from main memory to cold storage, and it would take some time to bring it

To make an admittedly bad metaphor, it's likely a lot of that knowledge has been moved from main memory to cold storage, and it would take some time to bring it back. It certainly makes the case for why we write things down! Although the part about having to dig for the main result makes me think the abstract could be improved...