Digital Brain
A personal knowledge system that mirrors and extends a mind
A digital brain is a personal knowledge system designed to capture, link, and evolve ideas over time, acting as a cognitive exoskeleton rather than a static archive. The goal is compounding: preserving context and provenance so an idea can be revisited, challenged, and extended years later, much like a Second Brain.
Conceptually it descends from the Memex. Practically, it shows up as projects like Project Aldehyde and systems like Extracranial that reduce the cost of linking, retrieval, and maintenance.