3 published lessons with this tag.
A note that captures exactly one idea can be understood without its original context, linked to any argument, and recombined indefinitely — a note that captures two ideas can do none of these things reliably.
You choose how finely to decompose based on your purpose — not on some inherent "correct" level of detail. The same material supports different grain sizes for different uses.
Each atom exists in relationship to others — atomicity is about self-containment not loneliness.