Apple Notes, Bear, Obsidian and Jotaid store notes in four different structures — and the structure decides which questions you can ask of them later.
Folders, Tags, Files, Entities: Four Ideas of What a Note Is
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Thinking
Stop Managing Notes. Start Developing Concepts.
Zettelkasten, backlinks and knowledge graphs promise connected thinking and rarely deliver. Why the unit worth building around is the concept, not the note.