Wonderful find. It's reassuring to read Luhmann himself encountered the same phenomena I encounter right now: (de)fragmenting segments of information at the time of input or output, deterritorialization/weakening of preliminary topics of interest, telegraphic summaries/labels/qual. codes of reading as an idiosyncratic language to be further recombined into higher theories. Favorite (ChatGPT translated) quotes:

Misplacements must be corrected by references, not by rearranging

What belongs together changes with the question being asked and cannot be decided schematically in advance

Emphasis mine — Piagetian schemas? — see also: Rebecca chapter in Oliver Sacks' The Man Who Mistook his Wife for a Hat.

Excerpts? Only when they involve formal definitions or particularly concise formulations

a honing of one's own language

Being superceded is unavoidable. Proof of successful learning.

Being superceded by future notecards and thinking? See also: Binding vs. persuasive precedent, stare decisis.

information about literature not yet read on specific topics should be incorporated directly into the slip box at the appropriate location

I tend to write "See also: [other topics]" in the most recent notecards of a given "narrative" segment (similar to Folgezettel) even though those other topics are not written about yet. It is like a preview.

Others work differently.

Thank god!!