Split notes at every 'and' or 'also' — one idea per note, linked explicitly
When a note contains multiple ideas connected by 'and' or 'also,' create separate notes—one per idea—with explicit links between them, rather than allowing compound ideas to remain fused in a single container.
Why This Is a Rule
Compound notes — notes containing multiple ideas joined by "and," "also," or "additionally" — are the most common structural debt in knowledge bases. They feel efficient (one note instead of three) but degrade every operation: linking is imprecise (which idea does the link connect to?), searching is noisy (the note matches queries for all contained ideas), and retrieval is unreliable (you find the note but can't quickly extract the specific idea you need).
Luhmann's Zettelkasten principle of atomicity — one idea per note — exists specifically to prevent this. Atomic notes can be linked precisely, retrieved cleanly, and recombined flexibly. Compound notes can't be partially linked, partially retrieved, or partially reused. They're all-or-nothing containers that resist the combinatorial power of a well-structured knowledge system.
The words "and" and "also" are linguistic markers of compoundedness. They signal that the note is serving as a container for multiple ideas rather than an expression of one idea. When you see them, split.
When This Fires
- Reviewing notes and finding compound sentences with "and," "also," "additionally," or "furthermore"
- Creating a new note and realizing it covers two distinct ideas
- During knowledge base maintenance when a note refuses to be cleanly linked
- Any time a note seems relevant to multiple unrelated contexts (it's probably compound)
Common Failure Mode
Splitting too aggressively into fragments that lack standalone meaning. "Cognitive load" is not a note — it's a keyword. "Working memory has a 4±1 item capacity, which means compound ideas exceed processing limits" is an atomic note — it states one complete idea that stands on its own. The test for atomicity: can this note be understood without reading any linked notes? If yes, it's atomic. If no, it's a fragment, not a note.
The Protocol
When reviewing or creating notes: (1) Scan for "and," "also," "additionally," and semicolons connecting distinct ideas. (2) For each compound connection, ask: "Are these truly one idea, or two ideas that happen to be adjacent?" (3) If two ideas: create a separate note for each. (4) Add an explicit link between the new notes, with a relationship label if your system supports it ("relates_to," "contrasts_with," "enables"). (5) Delete the compound original or convert it into a hub note that links to its atomic children.