This seems to be linked to "idea sex". Permanent notes is where idea sex is happening. And I have to make space and time to allow for that to happen as part of the daily life. The good callout is about the atomicity of the ideas. They should be captured as atomic ideas. One thing that I got out of Sonke's book was that a zettle is a discrete idea which maybe useful in a different context than what it was noticed. And if I don't keep them atomic, that transference from context to context will not be facilitated. So, that's important thing to keep in mind. So, two key things until now - first, make time and space for idea sex. Second, capture atomic ideas.
But for roam, where do literature nots and permanent notes sit? Fleeting notes are in quick capture or blocks in the daily notes section. I am guessing literature notes are going to be under the Title of the piece that I am consuming. So a Roam page with the title and all these highlights and my notes about them sitting in there. And what abut permanent notes? I'll have to figure that out. And perhaps the upcoming Roam Research book club on Sonke's book will help answer the question. My guess is that when I create bidirectional links and the notes I write in there would be the permanent notes and the ones that become part of the writing outcome.