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MOLECULAR NOTES - A SECOND BRAIN SYSTEM TO DEAL WITH CONCEPTS, INSIGHTS AND IDEAS

These are some notes I took while reading 2 interesting articles from someone explaining his second brain system.

2023 February 25

Rationale

  • “Our brains compute across a knowledge graph”

  • This system deals with concepts, insights and ideas

  • The goal is to map concepts - and “not have a personal detailed Wikipedia”.

Objectives

  • Learn from various media (articles, books, videos, etc):
  • notes should have only the key ideas
  • write the original resource for the details
  • Retain insights and understanding
  • “rapidly achieve the same level of understanding about something that I once had in the past”
  • Quadratical growth
  • link each piece of knowledge to our existing knowledge
  • Create new ideas (optional)
  • Allow to have new perspectives and where to expand the knowledge
  • Make learning into a habit Follow the hook model, to allow the habit to form:
  • trigger: notification (external) or checking news when waking up (internal)
  • action: done waiting for a reward
  • variable reward
  • so, the 3 points above results on you investing time into the habit.

Primitives

  1. Sources: the reference (book, podcast, video, article, etc)

  2. Atoms: existing concepts or techniques (like “an entry on a dictionary” or a “wikipedia article”)

  3. Molecules: your ideas - crystallised insights and pieces of intuition. They are the link between atoms - so, they are analogue to “zettels” in the Zettelkasten system.

  4. Categories: used to organize sources, atoms and molecules.

“Mine atoms out of Sources, make Molecules out of Atoms, and organize everything with Categories.”

Source

  • Media or information you want to learn from

  • They use to have:

  • Concepts: original to the author or existing ones s/he is building upon
  • Examples: Additional details, context and examples that illustrate the concepts
  • Thesis: explanation on how concepts link to other concepts
  • How to takes notes on a source: capture (briefly) the core thesis of a Source, the key concepts, and 1 or 2 of the best examples.

  • A source has some knowledge that is unique to the source, and other ones that exist outside of it. That is why we should extract each concept on an individual note - hence, your “atoms”.

  • Extract an Atom if it looks like other sources may reference to it, or if you will link ideas to that atom in the future.

  • You can extract an atom from a source in a future time, maybe when you are re-reading or editing your notes.

  • If a source only has one concept, do not create a “source note” - create an atom directly linking to the source.

Principles

  • Notes should mention the key concepts on a source, but not explain them - the explanation will be on an atom for the concept.

  • Reduce the author thesis to the simplest form - maximum 3 bullet points

  • A note should tell what is inside the source, not repeat its’ contents. Notes are pointers!

  • Use a simple and flexible structure. You can e.g. use bullets, where the top-level ones “summarize” the ideas and the lower levels give more information. If even more information is needed, just open the original source.

Atom

  • An EXISTING concept, technique, formula, framework etc explained on your own words

  • (to detect them, think like that: they could have an Wikipedia page or Dictionary entry)

  • should link to a Source note

Principles

  • Explain a concept to you - such you can rapidly regain an understanding you once had. So, you must write them in a few words.

  • Show how that piece of knowledge fits with other atoms. You can link the current atom with other ones - through the original source and/or through “Categories”.

  • An atom is a pointer to a resource (with some personal information attached)

  • An atom can link to its source and also to the best resource that explains it.

  • An atom can also directly link to other atom.

Molecule

  • An insight that can stand on its’ own.

  • Couple of sentences - a paragraph at most.

  • Builds on one or more atoms.

  • “Insights / moments of clarity you have inspired by a source”

  • “How to know when to write a molecule or a bullet point in the Source? If the idea is so internalized to you that it becomes a piece of YOUR intuition.”

Categories

  • They can be empty notes you can link to

The author’s implementation

Tags

  • Denote the “type” of a note. It represents a “is-a” relationship. E.g.: source, atom, molecule - and, also: book, video, article, framework

  • Source notes can have an additional tag denoting the type of the source: book, article.

  • Atoms can have an additional tag denoting its’ type: tool, formula, historical event, etc

  • You can use a “TODO” tag to remember yourself to do something on your notes - review, refine, create a new one or do some research on something that you need to explore or learn deeper

  • Useful on obsidian

Folders

  • He uses Obsidian

  • Atoms go on the “root”

  • Sources and Molecules are subdirectories

  • Other subdirectories are: Authors, Topics

  • Subdirectories that start with “_” are used by Obsidian

  • The author mentions that having folders named “Sources” and “Molecules” can seem like a duplication of the tags of the same name, but they ease quickly searching for a primitive on the folder - atoms will be on the folder root, and sources and molecules on subdirectories. So, maybe I could use the same approach because my first experiment will be using Neovim to write the notes but Obsidian to explore it.

  • He says sometimes he forgets to move a note to the correct folder - so, he wrote a python script to move notes tagged “#molecule” to the molecules folder

Topics

  • “Semantic” structure (tags and folders are organizational). Topic example: “Finance”
  • A topic is like a “business domain”
  • The author tends to create a topic if more than 5 notes will link to it

Authors

  • It is a note with type “#author” - it allows to write information about the author

  • Are useful on Obsidian

  • Useful only if there are several sources of the same author in atoms/molecules

  • He also has a python script to move them to the appropriate folder when he forgets

Insights on how to take notes on Sources

Books

  • Review and highlights in Notion

  • Key highlights on a Source note

  • Extracts concepts in Atoms and insights in Molecules

  • He looks through other notes on the same Topic to find potential connections

Textbooks / Online courses

  • Read/watch them on 2x speed to get an idea of the contents and if it indeed is useful

  • Make notes on the second pass

  • Mimic the source structure (chapters/marks)

  • On chapters/marks, only take notes on what he wants to keep

Blog posts / YouTube videos / Twitter

  • They generally only have a single concept

  • If that is the case indeed, create directly an atom and link to the media url instead of the source note.

Podcasts

  • Only take notes if an insight appears or something resonate with you

  • Interview episodes: since they tend to be dense in information, make notes as if they were online courses / textbooks.

Others

NOTE: The original content(s) that inspired this one can be found at:
https://reasonabledeviations.com/2022/04/18/molecular-notes-part-1
https://reasonabledeviations.com/2022/06/12/molecular-notes-part-2
All copyright and intellectual property of each one belongs to its' original author.