Question
Why does tag taxonomy fail?
Quick Answer
Creating a tag taxonomy before you have enough atoms to need one. You design a careful hierarchy — #work/meetings/retrospectives — and then spend more energy maintaining the structure than writing the notes. The system collapses under its own organizational weight. The opposite failure is never tagging at all, leaving your atoms as isolated fragments that cannot find each other.
The fix: Open your note system and pick 10 recent atoms. For each one, add 1–3 tags that answer this question: 'If I had this same insight again in a different context, what word would I search for?' Do not overthink. Do not build a taxonomy first. Tag by instinct, then review your tags as a batch. Notice which tags recur. Notice which atoms are now connected that were not connected before.
The underlying principle is straightforward: A tag is the simplest way to declare that two atoms share something in common.
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Go beyond the answer
This topic is part of Build Your AI Second Brain — a guided sequence of 16 lessons.
After completing this path you will have a capture habit that catches thinking before it decays, notes structured so both you and an AI can retrieve them (atomic, identified, context-rich), a personal knowledge graph AI tools can answer from, and the review loop that keeps the system alive. Ask-don't-search becomes your default.
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