A system about systems of thinking. I now have a METABRAIN file in my second brain system, a catalog of every major knowledge architecture I could find:

  • Karpathy-style AI repos [I,S,R]

  • Zettelkasten [O,R,M]

  • PARA [I,O]

  • Evergreen Notes [O,M]

  • Digital Gardens [O,S]

  • Molecular Notes [O,S]

  • Knowledge Graphs [R,M]

  • Agent memory systems [R,S,M]

  • Research pipelines [I,S]

  • Vector retrieval architectures [R]

These systems are solving different layers: Ingestion [I], Organisation [O], Retrieval [R], Synthesis [S], Memory [M].

Things I found this week…

  1. They say that every face you see in waking life is recalled while dreaming Collecting faces for dreams is one of the reasons large cities exist

— é. urcades

  1. Mendeleev and the Periodic Table, he had a book deal and had to fit it on a page.

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  1. Wolfgang Schadner: the closed formula for the direct inversion of Black & Scholes option implied volatility

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  1. ROMAN LETTERS 7,049 letters, organised, from between the 1st and 8th centuries.
  • DARE historical map with Roman road network overlay. Letters flow along ancient roads, 250–750 AD.
romanletters.org /map/
  1. Vibe coded games https://neal.fun/