"It is requisite that a man should arrange the things he wishes to remember in a certain order, so that from one he may come to another: for order is a kind of chain for memory" – Thomas Aquinas, Summa Theologiae. Not ironically I found the passage in my Zettelkasten.

Actually this is how LLMs (with reasoning) work as well. There is the pre-training which is analogous to the human brain getting trained by as much information as possible. There is a "yet unknown" threshold of what is enough pre-training and then the models can start reasoning and use tools and the feedback from it to do something that resembles to human thinking and reasoning. So if we don't pre-train our brains with enough information, we will have a weak base model. Again this is of course more of an analogy as we yet don't know how our brains really work but more and more it is looking remarkably aligned with this hypothesis.

I always tell people that I don't remember all the answers, only where to find them.

This is task-specific. Consider having a conversation in a foreign language. You don't have time to use a dictionary, so you must have learned words to be able to use them. Similarly for other live performances like playing music.

When you're writing, you can often take your time. Too little knowledge, though, and it will require a lot of homework.

Just to be clear, are you saying that to know something:

1- You may remember only the initial state and the brain does the rest, like with mnemonics

2- You may remember only the initial steps towards a solution, like knowing the assumptions and one or two insights to a mathematical proof?

I'd say a Zettlekasten user would agree with you if you mean 1

Of course you have to remember everything. Your brain stores everything, and you then get to add things by forgetting, but that does not mean you erase things. The brain is oscillatory, it works somehow by using ripples that encode everything within differences, just in case you have to remember that obscure action-syntax...a knot, a grip, a pivot that might let you escape death. Get to know the brain, folks.

A bit like the memory palace. One memory leads to another. Not random-access.

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