A Second Brain Is Not a Memory Store

The term second brain is not new. For years, people have used it to describe the habit of collecting notes in an app, tagging them, and searching for them when needed.

That is how I began, too.

These approaches have one thing in common: a person puts things in, and a person looks for them. Even after AI was added, only the last step changed. A person saves a record, a person searches for it, and AI reads the result. What I had not put in did not exist. What I had not searched for never came to mind.

However large a filing cabinet becomes, it is still a filing cabinet.

Original Korean diagram comparing stored notes with memory that makes new connections

English key to the original diagram. Top, the filing-cabinet second brain: a person stores → a person searches → AI reads. What I do not enter is...

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