General instructions for using a Memindex

HOW IT IS USED <br /> Things to be done today, jot on face card. Things to be done tomorrow or next Friday, jot on card for that day. Things to keep before you until done, jot on opposite front card. A matter for January 10th jot on a short card put under the band till you return to your desk, then file next to card for January 10th when it will come out and refresh your memory.

Things to be done when in New York or Chicago jot on card "N" or "C." The new address of Mr. Jones, under "J." Ideas on advertising jot on card tabbed "adv." Things for your clerk to do, on his card , etc., etc. Retire today's card tonight, carrying forward things not completed and put next card in the file in has proved that almost back of pocket case. The alphabet enables one to index all jottings for instant reference. This system is very comprehensive yet perfectly simple. You soon the learn to depend on it every hour of every day.

Within the general instructions in a 1904 Memindex advertisement (next to an ad for "Genuine Edison Incandescent Lamps") we see the general ideas of indexing things into the future and carrying undone tasks forward, just as is done in the bullet journal method.

Geyers Stationer. “Memindex Advertisement.” Geyer’s Stationer: Devoted to the Interests of the Stationery, Fancy Goods and Notion Trades, September 15, 1904. https://www.google.com/books/edition/Geyer_s_Stationer/L507AQAAMAAJ?hl=en&gbpv=0

Howard L. Wilson of Rochester, NY named his vest pocket card index system the Memindex.

Poem from the inside back cover of a 1913 Memindex Catalog:

JUST JOT IT DOWN.

If you’re going to meet a man<br /> Jot it down<br /> If you’ve got a little plan<br /> Jot it down<br /> If you never can remember<br /> Your requirements for September<br /> ’Till October or November<br /> Jot ’em down.

If you’ve got a note to pay<br /> Jot it down<br /> If its due the first of May<br /> Jot it down<br /> If collections are so slow<br /> That to meet the note you know<br /> You must dun old Richard Roe<br /> Jot it down

If you have a happy thought<br /> Jot it down<br /> If there’s something to be bought<br /> Jot it down<br /> Whether duty calls or pleasure<br /> If you’re busy or at leisure<br /> It will help you beyond measure<br /> Jot it down

If there’re facts that you’d retain<br /> Jot ’em down<br /> If you’ve got to meet a train<br /> Jot it down<br /> If at work or only play<br /> If at home or far away<br /> In the night or in the day<br /> Jot it down

c.1913 Wilson Memindex Desk Organzier Catalog Price List Booklet Rolodex Prequel

In a 1913 catalog for the Wilson Memindex, the company suggested putting to do items and one's schedule on one side of the card and potentially keeping one's accounts or a diary on the reverse side.

1930s Wilson Memindex Co Index Card Organizer Pre Rolodex Ad Price List Brochure

archived page: https://web.archive.org/web/20230310010450/https://www.ebay.com/itm/165910049390

Includes price lists

List of cards includes: - Dated tab cards for a year from any desired. - Blank tab cards for jottings arranged by subject. - These were sold in 1/2 or 1/3 cut formats - Pocket Alphabets for jottings arranged by letter. - Cash Account Cards [without tabs]. - Extra Record Cards for permanent memoranda. - Monthly Guides for quick reference to future dates. - Blank Guides for filing records by subject.. - Alphabet Guides for filing alphabetically.

Memindex sales brochures recommended the 3 x 5" cards (which had apparently been standardized by 1930 compared to the 5 1/2" width from earlier versions around 1906) because they could be used with other 3 x 5" index card systems.

In the 1930s Wilson Memindex Company sold more of their vest pocket sized 2 1/4 x 4 1/2" systems than 3 x 5" systems.

Some of the difference between the vest sized and regular sized systems choice was based on the size of the particular user's handwriting. It was recommended that those with larger handwriting use the larger cards.

By the 1930's at least the Memindex tag line "An Automatic Memory" was being used, which also gave an indication of the ubiquity of automatization of industrialized life.

The Memindex has proved its success in more than one hundred kinds of business. Highly recommended by men in executive positions, merchants, manufacturers, managers, .... etc.

Notice the gendering of users specifically as men here.

Features: - Sunday cards were sold separately and by my reading were full length tabs rather than 1/6 tabs like the other six days of the week - Lids were custom fit to the bases and needed to be ordered together - The Memindex Jr. held 400 cards versus the larger 9 inch standard trays which had space for 800 cards and block (presumably a block to hold them up or at an angle when partially empty).

The Memindex Jr., according to a price sheet in the 1930s, was used "extensively as an advertising gift".

The Memindex system had cards available in bundles of 100 that were labeled with the heading "Things to Keep in Sight".

Vintage Memindex Wilson Wood Box 1937-38 Diary Planner Date Keeper Ephemera

Includes particularly good image of the individual day cards:

Notice that the tabs are done as 1/6th as most of these systems were manufactured/sold with out including Sunday.

Shaw, A. W. System: The Magazine of Business. Vol. 10. A. W. Shaw Company, 1906. https://www.google.com/books/edition/System/3qvNAAAAMAAJ?hl=en&gbpv=0.

via image at https://www.ebay.com/itm/125806081747

And Mr. H. Beebe of Chicago, using but one drawer, says: "It has made me keep appointments and lay out my work to increase the things I can do in a day. "

Example of sales touting productivity in a filing system.

Note also the specific gendering of the clerk here in 1906.

Getting Things Done with Index Cards<br /> by Jazz DiMauro

referenced in Lifehacker article as early as 2005

Note the use of envelopes for separation. Did this predate the Noguchi Filing System, inspired by it or wholly separate?

The Hipster PDA<br /> by Gina Trapani

Arch Wilkinson Shaw<br /> https://en.wikipedia.org/wiki/Arch_Wilkinson_Shaw

• Founder of Shaw-Walker with Louis C. Walker,
• publisher of System: The Magazine of Business which was sold to McGraw-Hill Company in 1927/8 and renamed Business Week which was later renamed Bloomberg Business Week.

https://onlinebooks.library.upenn.edu/webbin/serial?id=system1900

Główna myśl tekstu:

Publiczna propaganda czasu wolnego powinna polegać [...] [na] stworzeniu przez państwo ogólnych warunków do wypoczynku, czyli na odpowiednim zorganizowaniu świata wokół nas, najlepiej tak, by wypoczynek mógł mieć, przynajmniej czasami i dla chętnych, wymiar wspólnotowy.

Tekst przedstawia problem braku odpowiedniego przeżywania czasu wolnego, naskórkowo omawia jego przyczyny i lakonicznie, przy pomocy banałów, przedstawia potencjalne rozwiązania.

Problem: nie potrafimy odpoczywać.

Przyczyna: zaniedbania systemowe, kapitalizm.

Wypoczynek jest wyzwaniem. Kapitalizm (system) mu nie sprzyja. Dodatkową przyczyną jest „huczenie świata”, a więc przebodźcowanie i ciągłe skupienie na powiadomieniach, przede wszystkim tych z mediów społecznościowych.

Rozwiązanie: działania systemowe, wynikające z narzuconych odgórnie ograniczeń (indywidualne praktyki są doraźne i mają mniejsze znaczenie). Wśród tych działań systemowych są: wspólnotowe zaangażowanie, wyższa edukacja, infrastruktura kulturalno-sportowa (obiekty), infrastruktura komunikacyjna (dojazd), zieleń.

https://catalog.hathitrust.org/Record/100006275<br /> System: The Magazine of Business Published: Shaw-Walker Co., [1900]-1927. Muskegon, Mich.

Later Business Week and then Bloomberg Business Week

• Title
  • Impacts of meeting minimum access on critical earth systems amidst the Great Inequality
• Abstract

• Paraphrase

  • The Sustainable Development Goals aim to improve access to resources and services, reduce environmental degradation, eradicate poverty and reduce inequality.
  • However, the magnitude of the environmental burden that would arise from meeting the needs of the poorest is under debate—especially when compared to much larger burdens from the rich.
  • The ‘Great Acceleration’ of human impacts was also accompanied by a ‘Great Inequality’ in using and damaging the environment.
  • To correct the great inequality, the authors define ‘just access’ to minimum energy, water, food and infrastructure.
  • The penality incurred for achieving just access in 2018, with existing inequalities, technologies and behaviours, would have produced 2–26% additional impacts on the Earth’s natural systems of climate, water, land and nutrients—thus further crossing planetary boundaries.
  • These hypothetical impacts, caused by about a third of humanity, equalled those caused by the wealthiest 1–4%.
  • Technological and behavioural changes thus far, while important, did not deliver just access within a stable Earth system.
  • Achieving these goals therefore calls for a radical redistribution of resources.

• Comment

  • Check the 1/3 figure against the 2/3 figure equal to 4% of the wealthiest in the Earth System Justice paper: https://www.nature.com/articles/s41893-023-01064-1#annotations:3cWMhLv6Ee2jgD9EDXKNVA

• Earth Commission has develop principles for sharing responsibilities for cities and companies.
• Comment
  • This is implicitly a form of downscaling

• Comment
• "Fortress conservation" is an example of approaching safe boundaries but not considering JUST boundaries.

• The meaning of safe and JUST ESBs
• Safe:
  • stabilize the Earth system,
  • protect species and ecosystems,
  • avoid tipping points
• JUST:
  • minimize ‘significant harm’ to people
  • while ensuring access to resources for a dignified life and escape from poverty.
  • If JUSTice is not considered,
    • the biophysical limits may not be adequate to protect current generations from significant harm.
    • IF JUSTICE is not explicitly included, it can lead to a progress trap.
      • https://jonudell.info/h/facet/?max=100&expanded=true&user=stopresetgo&exactTagSearch=true&any=Progress+trap
  • Strict biophysical limits, such as reducing emissions or setting aside land for nature,
    • may lead to intended consequences that reduce access to food and land for vulnerable people.
    • To mitigate this, biophysical limited should be complemented by fair sharing and management of the remaining ecological space on Earth.

• collaboration between natural and social scientists that uses joint knowledge to identify safe and just ESBs for:
  • blue water,
  • climate change,
  • biodiversity,
  • nutrients (nitrogen and phosporus),
  • air pollution

• = Earth system justice
• build upon = Doughnut economics socio-economic boundaries.

• Planetary justice scholarship goes further than global justice
• it:
  • calls for radical or profound changes to justice understandings in the Anthropocene,
  • critiques anthropocentricism,
  • calls for greater engagement with the non-human world
• Comment
  • See Symbiocene
  • https://jonudell.info/h/facet/?max=100&expanded=true&user=stopresetgo&exactTagSearch=true&any=Symbiocene

• Differences between Global North and Global south perspectives on earth system justice:
• Some scholars argue that in the Global North, the view tends to be ‘no humanity without nature’,
• while in the Global South, the focus is on ‘no nature without social justice’.

• Title
• Earth system justice needed to identify and live within Earth system boundaries
• Abstract
• Paraphrase
• Living within planetary limits requires attention to justice as biophysical boundaries are not inherently just.
• Through collaboration between natural and social scientists, the = Earth Commission
  • defines and operationalizes = Earth system justice
  • to ensure that boundaries:
    • reduce harm,
    • increase well-being,
    • reflect substantive and procedural justice.
• Such stringent boundaries may also affect ‘just access’ to:
  • food,
  • water,
  • energy,
  • infrastructure.
• We show how boundaries may need to be adjusted to:
  • reduce harm,
  • increase access,
  • challenge inequality to ensure a safe and just future for people, other species and the planet.
• Earth system justice may enable living justly within boundaries.

Vintage 1900 Macey Card Business System Fred Macey Company Original Ad 1021 A2<br />

https://www.ebay.com/itm/275147213477

Copy in notes folder as backup

Copy in Notes folder.

https://www.ebay.com/itm/275144504113

• The conclusion of this study is that the ultimate definition of justice is that all of us have a right to a stable planet.
• Earth System Boundaries are like doughnut economics and include social justice as well.
• Earth System Justice is a multi-dimensional definition of justice including:
  • justice among present nations, communities and individuals (Intragenerational Justice),
  • justice for future generations (Intergenerational justice),.
  • justice for other living things and Earth system stability (‘Interspecies Justice and Earth system stability’)

• Title

  • How to stop cities and companies causing planetary harm

• Author

  • Xuemei Bai,
  • Anders Bjørn,
  • Şiir Kılkış,
  • Oscar Sabag Muñoz,
  • Gail Whiteman,
  • Holger Hoff,
  • Lauren Seaby Andersen,
  • Johan Rockström

Next year, the Earth Commission, including many of the scientists on this report, will issue a report outlinging the Earth System Boundaries (ESB) to hlep cities and corporations stay within planetary boundaries.

optimization-procrastination trap is related to shiny object syndrome - the idea of tweaking one's system constantly

perfect tool trap - guess what? there isn't one

List of all of key concepts

There seems to be a number of issues with the positive and negative feedback systems these social media companies are trying to create. What are they really measuring? The either aren't measuring well or aren't designing well (or both?)...

• = key question
• where is the change in the world taking place?
• decades of NGO organizations attempting to make change
• but there has been no substantial impact
• why? why not?

• = extended altriciality
• creates opportunities for sophisticated = social learning
• within the = parent-offspring system.

• See references on = John Boik's evidence-based approach to build a social superorganism and Peter Nonacs, Amanda Robin and Kayla Denton's research on = Major System Transition and especially the variables that play the support role of = Facilitating Evolutionary Transition (FET), which include = Major Evolutionary Transition (MET) and = Major Competitive Transition (MCT)

https://jonudell.info/h/facet/?max=100&expanded=true&user=stopresetgo&exactTagSearch=true&any=major%2Bevolutionary%2Btransition

!- required transformation : global movement to accept and live writing these boundaries

!- key question : can we quantify a safe and just corridor?

!- Title : Leading the charge through earth’s new normal !- speakers : Johan Rockstrom et al.

As humans we're good at separating things based on categories. The Dewey Decimal System systematically separates mathematics and history into disparate locations, but your zettelkasten shouldn't force this by overthinking categories. Perhaps the overlap of math and history is exactly the interdisciplinary topic you're working toward? If this is the case, just put cards into the slip box closest to their nearest related intellectual neighbor—and by this I mean nearest related to you, not to Melvil Dewey or anyone else. Over time, through growth and branching, ideas will fill in the interstitial spaces and neighboring ideas will slowly percolate and intermix. Your interests will slowly emerge into various bunches of cards in your box. Things you may have thought were important can separate away and end up on sparse branches while other areas flourish.

If you make the (false) choice to separate math and history into different "sections" it will be much harder for them to grow and intertwine in an organic and truly disciplinary way. Universities have done this sort of separation for hundreds of years and as a result, their engineering faculty can be buildings or even entire campuses away from their medical faculty who now want to work together in new interdisciplinary ways. This creates a physical barrier to more efficient and productive innovation and creativity. It's your zettelkasten, so put those ideas right next to each other from the start so they can do the work of serendipity and surprise for you. Do not artificially separate your favorite ideas. Let them mix and mingle and see what comes out of them.

If you feel the need to categorize and separate them in such a surgical fashion, then let your index be the place where this happens. This is what indices are for! Put the locations into the index to create the semantic separation. Math related material gets indexed under "M" and history under "H". Now those ideas can be mixed up in your box, but they're still findable. DO NOT USE OR CONSIDER YOUR NUMBERS AS TOPICAL HEADINGS!!! Don't make the fatal mistake of thinking this. The numbers are just that, numbers. They are there solely for you to be able to easily find the geographic location of individual cards quickly or perhaps recreate an order if you remove and mix a bunch for fun or (heaven forfend) accidentally tip your box out onto the floor. Each part has of the system has its job: the numbers allow you to find things where you expect them to be and the index does the work of tracking and separating topics if you need that.

The broader zettelkasten, tools for thought, and creativity community does a terrible job of explaining the "why" portion of what is going on here with respect to Luhmann's set up. Your zettelkasten is a crucible of ideas placed in juxtaposition with each other. Traversing through them and allowing them to collide in interesting and random ways is part of what will create a pre-programmed serendipity, surprise, and combinatorial creativity for your ideas. They help you to become more fruitful, inventive, and creative.

Broadly the same thing is happening with respect to the structure of commonplace books. There one needs to do more work of randomly reading through and revisiting portions to cause the work or serendipity and admixture, but the end results are roughly the same. With the zettelkasten, it's a bit easier for your favorite ideas to accumulate into one place (or neighborhood) for easier growth because you can move them around and juxtapose them as you add them rather than traversing from page 57 in one notebook to page 532 in another.

If you use your numbers as topical or category headings you'll artificially create dreadful neighborhoods for your ideas to live in. You want a diversity of ideas mixing together to create new ideas. To get a sense of this visually, play the game Parable of the Polygons in which one categorizes and separates (or doesn't) triangles and squares. The game created by Vi Hart and Nicky Case based on the research of Thomas Schelling provides a solid example of the sort of statistical mechanics going on with ideas in your zettelkasten when they're categorized rigidly. If you rigidly categorize ideas and separate them, you'll drastically minimize the chance of creating the sort of useful serendipity of intermixed and innovative ideas.

It's much harder to know what happens when you mix anthropology with complexity theory if they're in separate parts of your mental library, but if those are the things that get you going, then definitely put them right next to each other in your slip box. See what happens. If they're interesting and useful, they've got explicit numerical locators and are cross referenced in your index, so they're unlikely to get lost. Be experimental occasionally. Don't put that card on Henry David Thoreau in the section on writers, nature, or Concord, Massachusetts if those aren't interesting to you. Besides everyone has already done that. Instead put him next to your work on innovation and pencils because it's much easier to become a writer, philosopher, and intellectual when your family's successful pencil manufacturing business can pay for you to attend Harvard and your house is always full of writing instruments from a young age. Now you've got something interesting and creative. (And if you must, you can always link the card numerically to the other transcendentalists across the way.)

In case they didn't hear it in the back, I'll shout it again: ACTIVELY WORK AGAINST YOUR NATURAL URGE TO USE YOUR ZETTELKASTEN NUMBERS AS TOPICAL HEADINGS!!!

!- role of participatory democracy : governance

!- comment - this is what bottom-up rapid whole system change relies upon - Indyweb / SRG / TPF aspires to create such a global space

Curious if he means can run on different devices or an installation spans multiple devices. I'm interested in considering the operating system as a control plane for many devices. Additionally multi-user support for sharing hardware.

Extrem interessanter Artikel von Alex Turnbull über die unzureichenden Modellierungen von Waren- und Rohstoffströmen, vor allem in Bezg auf fossile Energien. Politische und wirtschaftliche Entscheidungen werden aufgrund unzureichenden Wissen über Logistik und Infrastruktur getroffen.

https://en.wikipedia.org/wiki/Leiden_Conventions

Classical scholars met in 1931 to establish a set of convention and sigla (symbols, brackets, etc.) for indicating the conditions of texts, editorial corrections, and restorations in inscriptions, papyri, manuscripts and other writing contexts.

Micheal Hudson : tax the rent seeking class or face barbarism like in Rome - The situation today is degrading in the same way Rome degraded into feudalism - rent seeking class today is not the landlord class, but the financial and raw materials class that are making large fortunes from rent seeking - that is the system level reform necessary today

Singapore’s First-Rate Payroll Software Payroll software Singapore Hectic payroll periods? Multiple pay runs? Simplify and streamline your payroll process with QuickHR’s holistic payroll software! Never miss a pay date, no matter the number of pay runs you need.

Tak ada asu kecuali konstruksi semantik yang muncul dari jejak histori interaksi sesuasu dengan kahanan di sekitarnya dan seberapa asu sesuasu itu mengekspresikan keasuannya,

A good list of tactics to communicate about innovation. For example,

• publish blogs, guides, videos with concrete tips,
• create a pool of champions
• basic education programs that help solve problems on the job

One could also think about a "virtual innovation" lab approach ...

• Government policy innovation
• Public services innovation (including service design and digital)
• Science and technology — governments employ thousands of scientists, engineers and researchers. Labs can think of ways for them to become more effective.
• Management systems innovation — “innovate” how government innovates to build skills, capacity and culture.

The article speaks about that "Management systems innovation" -- the way howe we build skills, capacity and culture -- is a key element for successful attempts for governments to innovation.

Concentrating on these aspects -- howe we work together, how we develop skills and capacity -- might be the key ingredients for a future for the OpenLab -- and the future of the innovation activities.

Maybe we could start offering "services" from the "OpenLab" to managers and teams ...?

This seems to be the key element here: systems-thinking approach and thinking about our role within our departments.

https://www.reddit.com/r/Zettelkasten/comments/zl2hwh/is_the_concept_of_personal_knowledge_management/

This essay seems to be more about shiny object syndrome. The writer doesn't seem to realize any problems they've created. Way too much digging into tools and processes. Note the switching and trying out dozens of applications. (Dear god, why??!!) Also looks like a lot of collecting digitally for no clear goal. As a result of this sort of process it appears that many of the usual affordances were completely blocked, unrealized, and thus useless.

No clear goal in mind for anything other than a nebulous being "better".

One goal was to "retain what I read", but nothing was actively used toward this stated goal. Notes can help a little, but one would need mnemonic methods and possibly spaced repetition neither of which was mentioned.

A list of specific building blocks within the methods and expected outcomes would have helped this person (and likely others), but to my knowledge this doesn't exist as a thing yet though bits and pieces are obviously floating around.<br /> TK: building blocks of note taking

Evidence here for what we'll call the "perfect system fallacy", an illness which often goes hand in hand with "shiny object syndrome".

Too many systems bound together will create so much immediate complexity that there isn't any chance for future complexity or emergence as the proximal system is doomed to failure. One should instead strive for immediate and excessive simplicity which might then build with time, use, and practice into something more rich and complex. This idea seems to be either completely missed or lost in the online literature and especially the blogosphere and social media.

people had come up with solutions Sadly, despite thousands of variations on some patterns, people don't seem to be able to settle on either "one solution" or their "own solution" and in trying to do everything all at once they become lost, set adrift, and lose focus on any particular thing they've got as their own goal.

In this particular instance, "retaining what they read" was totally ignored. Worse, they didn't seem to ever review over their notes of what they read.

I was pondering about different note types, fleeting, permanent, different organisational systems, hierarchical, non-hierarchical, you know the deal.

Why worry about all the types of notes?! This is the problem with these multi-various definitions and types. They end up confusing people without giving them clear cut use cases and methods by which to use them. They get lost in definitional overload and aren't connecting the names with actual use cases and affordances.

I often felt lost about what to takes notes on and what not to take notes on.

Why? Most sources seem to have reasonable guidance on this. Make notes on things that interest you, things which surprise you.

They seem to have gotten lost in all the other moving pieces. Perhaps advice on this should come first, again in the middle, and a third time at the end of these processes.

I'm curious how deeply they read sources and which sources they read to come to these conclusions? Did they read a lot of one page blog posts with summarizations or did they read book length works by Ahrens, Forte, Allosso, Scheper, et al? Or did they read all of these and watch lots of crazy videos as well. Doing it "all" will likely lead into the shiny object syndrome as well.

This seems to outline a list of specifically what not to do and how not to approach these systems and "popular" blog posts that are an inch deep and a mile wide rather than some which have more depth.

Worst of all, I spent so much time taking notes and figuring out a personal knowledge management system that I neglected the things I actually wanted to learn about. And even though I kind of always knew this, I kept falling into the same trap.

Definitely a symptom of shiny object syndrome!

-clinical consensus: science is something you vote for.

Storytelling tropes play into our system one heuristics and cognitive biases by riding on the tailcoats of familiar story plotlines we've come to know and trust.

What are the ways out of this trap? Creating lists of tropes which should trigger our system one reactions to switch into system two thinking patterns? Can we train ourselves away from these types of misinformation?

How do Bransford, Brown, & Cocking (2000) define schemas? (Metiri Group, Cisco Sytems, 2008) As chunks of multiple individual units of memory that are linked into a system of understanding

What term is defined by Bransford, Brown, & Cocking (2000) to be "chunks of multiple individual units of memory that are linked into a system of understanding"? (Metiri Group, Cisco Sytems, 2008) Schemas.

From Wikipedia page on Icarus Paradox. Example of architectural design/technical debt leading to an "interest rate" that eventually collapsed the organization. How can one "pay down the principle" and not just the "compound interest"? What does that look like for this scenario? More invest in workforce retraining?

Humans are complex, adaptive systems. Machines have a long history of being complicated, efficient (but not robust) systems. Is there a way to bridge this gap? What does an antifragile system of machines look like? Supervised learning? How do we ensure we don't fall prey to the oracle problem?

Baskerville, R.L.; Land, F. (2004). "Socially Self-destructing Systems". The Social Study of Information and Communication Technology: Innovation, actors, contexts. Oxford: Oxford University Press. pp. 263–285

Seems related to the paradox of information systems. Add to Anki deck

https://threadreaderapp.com/thread/1590111416014409728.html

I'm slowly getting the feeling that Musk is a system one thinker who relies on others to do his system two thinking.

Example implementation of Anki into learning maths

Thoughts on Zettelkasten numbering systems

I've seen variations of the beginner Zettelkasten question:

"What happens when you want to add a new note between notes 1/1 and 1/1a?"

asked at least a dozen times in the Reddit fora related to note taking and zettelkasten, on zettelkasten.de, or in other places across the web.

Dense Sets

From a mathematical perspective, these numbering or alpha-numeric systems are, by both intent and design, underpinned by the mathematical idea of dense sets. In the areas of topology and real analysis, one considers a set dense when one can choose a point as close as one likes to any other point. For both library cataloging systems and numbering schemes for ideas in Zettelkasten this means that you can always juxtapose one topic or idea in between any other two.

Part of the beauty of Melvil Dewey's original Dewey Decimal System is that regardless of how many new topics and subtopics one wants to add to their system, one can always fit another new topic between existing ones ad infinitum.

Going back to the motivating question above, the equivalent question mathematically is "what number is between 0.11 and 0.111?" (Here we've converted the artificial "number" "a" to a 1 and removed the punctuation, which doesn't create any issues and may help clarify the orderings a bit.) The answer is that there is an infinite number of numbers between these!

This is much more explicit by writing these numbers as:<br /> 0.110<br /> 0.111

Naturally 0.1101 is between them (along with an infinity of others), so one could start here as a means of inserting ideas this way if they liked. One either needs to count up sequentially (0, 1, 2, 3, ...) or add additional place values.

Decimal numbering systems in practice

The problem most people face is that they're not thinking of these numbers as decimals, but as natural numbers or integers (or broadly numbers without any decimal portions). Though of course in the realm of real numbers, numbers above 0 are dense as well, but require the use of their decimal portions to remain so.

The tough question is: what sorts of semantic meanings one might attach to their adding of additional place values or their alphabetical characters? This meaning can vary from person to person and system to system, so I won't delve into it here.

One may find it useful to logically chunk these numbers into groups of three as is often done using commas, periods, slashes, dashes, spaces, or other punctuation. This doesn't need to mean anything in particular, but may help to make one's numbers more easily readable as well as usable for filing new ideas. Sometimes these indicators can be confusing in discussion, so if ever in doubt, simply remove them and the general principles mentioned here should still hold.

Depending on one's note taking system, however, when putting cards into some semblance of a logical sort-able order (perhaps within a folder for example), the system may choke on additional characters beyond the standard period to designate a decimal number. For example: within Obsidian, if you have a "zettelkasten" folder with lots of numbered and named files within it, you'll want to give each number the maximum number of decimal places so that when doing an alphabetic sort within the folder, all of the numbered ideas are properly sorted. As an example if you give one file the name "0.510 Mathematics", another "0.514 Topology" and a third "0.5141 Dense Sets" they may not sort properly unless you give the first two decimal expansions to the ten-thousands place at a minimum. If you changed them to "0.5100 Mathematics" and "0.5140 Topology, then you're in good shape and the folder will alphabetically sort as you'd expect. Similarly some systems may or may not do well with including alphabetic characters mixed in with numbers.

If using chunked groups of three numbers, one might consider using the number 0.110.001 as the next level of idea between them and then continuing from there. This may help to spread some of the ideas out as surely one may have yet another idea to wedge in between 0.110.000 and 0.110.001?

One can naturally choose almost any any (decimal) number, so long as it it somewhat "near" the original behind which one places it. By going out further in the decimal expansion, one can always place any idea between two others and know that there will be a number that it can be given that will "work".

Generally within numbers as we use them for mathematics, 0.100000001 is technically "closer" by distance measurement to 0.1 than 0.11, (and by quite a bit!) but somehow when using numbers for zettelkasten purposes, we tend to want to not consider them as decimals, as the Dewey Decimal System does. We also have the tendency to want to keep our numbers as short as possible when writing, so it seems more "natural" to follow 0.11 with 0.111, as it seems like we're "counting up" rather than "counting down".

Another subtlety that one sees in numbering systems is the proper or improper use of the whole numbers in front of the decimal portions. For example, in Niklas Luhmann's system, he has a section of cards that start with 3.XXXX which are close to a section numbered 35.YYYY. This may seem a bit confusing, but he's doing a bit of mental gymnastics to artificially keep his numbers smaller. What he really means is 3000.XXX and 3500.YYY respectively, he's just truncating the extra zeros. Alternately in a fully "decimal system" one would write these as 0.3000.XXXX and 0.3500.YYYY, where we've added additional periods to the numbers to make them easier to read. Using our original example in an analog system, the user may have been using foreshortened indicators for their system and by writing 1/1a, they may have really meant something of the form 001.001/00a, but were making the number shorter in a logical manner (at least to them).

The close observer may have seen Scott Scheper adopt the slightly longer numbers in the thousands (like 3500.YYYY) as a means of remedying some of the numbering confusion many have when looking at Luhmann's system.

Those who build their systems on top of existing ones like the Dewey Decimal Classification, or the Universal Decimal Classification may wish to keep those broad categories with three to four decimal places at the start and then add their own idea number underneath those levels.

As an example, we can use the numbering for Finsler geometry from the Dewey Decimal Classification wikipedia page shown as:

``` 500 Natural sciences and mathematics

510 Mathematics

    516 Geometry

        516.3 Analytic geometries

            516.37 Metric differential geometries

                516.375 Finsler geometry

```

So in our zettelkasten, we might add our first card on the topic of Finsler geometry as "516.375.001 Definition of Finsler geometry" and continue from there with some interesting theorems and proofs on those topics.

Of course, while this is something one can do doesn't mean that one should do it. Going too far down the rabbit holes of "official" forms of classification this way can be a massive time wasting exercise as in most private systems, you're never going to be comparing your individual ideas with the private zettelkasten of others and in practice the sort of standardizing work for classification this way is utterly useless. Beyond this, most personal zettelkasten are unique and idiosyncratic to the user, so for example, my math section labeled 510 may have a lot more overlap with history, anthropology, and sociology hiding within it compared with others who may have all of their mathematics hiding amidst their social sciences section starting with the number 300. One of the benefits of Luhmann's numbering scheme, at least for him, is that it allowed his system to be much more interdisciplinary than using a more complicated Dewey Decimal oriented system which may have dictated moving some of his systems theory work out of his politics area where it may have made more sense to him in addition to being more productive on a personal level.

Of course if you're using the older sort of commonplacing zettelkasten system that was widely in use before Luhmann's variation, then perhaps using a Dewey-based system may be helpful to you?

A Touch of History

As both a mathematician working in the early days of real analysis and a librarian, some of these loose ideas may have occurred tangentially to Gottfried Wilhelm Leibniz (1646 - 1716), though I'm currently unaware of any specific instances within his work. One must note, however, that some of the earliest work within library card catalogs as we know and use them today stemmed from 1770s Austria where governmental conscription needs overlapped with card cataloging systems (Krajewski, 2011). It's here that the beginnings of these sorts of numbering systems begin to come into use well before Melvil Dewey's later work which became much more broadly adopted.

The German "file number" (aktenzeichen) is a unique identification of a file, commonly used in their court system and predecessors as well as file numbers in public administration since at least 1934. We know Niklas Luhmann studied law at the University of Freiburg from 1946 to 1949, when he obtained a law degree, before beginning a career in Lüneburg's public administration where he stayed in civil service until 1962. Given this fact, it's very likely that Luhmann had in-depth experience with these sorts of file numbers as location identifiers for files and documents. As a result it's reasonably likely that a simplified version of these were at least part of the inspiration for his own numbering system. † ‡

Your own practice

At the end of the day, the numbering system you choose needs to work for you within the system you're using (analog, digital, other). I would generally recommend against using someone else's numbering system unless it completely makes sense to you and you're able to quickly and simply add cards to your system with out the extra work and cognitive dissonance about what number you should give it. The more you simplify these small things, the easier and happier you'll be with your set up in the end.

References

Krajewski, Markus. Paper Machines: About Cards & Catalogs, 1548-1929. Translated by Peter Krapp. History and Foundations of Information Science. MIT Press, 2011. https://mitpress.mit.edu/books/paper-machines.

Munkres, James R. Topology. 2nd ed. 1975. Reprint, Prentice-Hall, Inc., 1999.

https://lifehacker.com/the-pile-of-index-cards-system-efficiently-organizes-ta-1599093089

LifeHacker covers the Hawk Sugano's Pile of Index Cards method, which assuredly helped promote it to the GTD and productivity crowd.

One commenter notices the similarities to Ryan Holiday's system and ostensibly links to https://thoughtcatalog.com/ryan-holiday/2013/08/how-and-why-to-keep-a-commonplace-book/

Two others snarkily reference using such a system to "keep track of books in the library [,,,] Sort them out using decimal numbers on index cards in drawers or something..." and "I need to tell my friend Dewey about this! He would run with it." Obviously they see the intellectual precursors and cousins of the method, though they haven't looked at the specifics very carefully.

One should note that this may have been one of the first systems to mix information management/personal knowledge management with an explicit Getting Things Done set up. Surely there are hints of this in the commonplace book tradition, but are there any examples that go this far?

An example of a ticker file in the vein of getting things done (GTD) documented using index cards and a card file from 1917. Sounds very familiar to the Pile of Index Cards (PoIC) from the early 2000s.

Sutherland, Lois Gilbert. “The English Teacher’s Card File.” The English Journal 6, no. 2 (1917): 111–12. https://doi.org/10.2307/801508.

Lois Gilbert Sutherland suggests using a card index system for multiple uses in the classroom including notes, administration, and general productivity.

There are so many parallels from this to how people are using platforms like Obsidian, Roam Research, and Notion in 2022.

Hello u/sscheper,

Let me start by thanking you for introducing me to Zettelkasten. I have been writing notes for a week now and it's great that I'm able to retain more info and relate pieces of knowledge better through this method.

I recently came to notice that there is redundancy in my index entries.

I have two entries for Number Line. I have two branches in my Math category that deals with arithmetic, and so far I have "Addition" and "Subtraction". In those two branches I talk about visualizing ways of doing that, and both of those make use of and underline the term Number Line. So now the two entries in my index are "Number Line (Under Addition)" and "Number Line (Under Subtraction)". In those notes I elaborate how exactly each operation is done on a number line and the insights that can be derived from it. If this continues, I will have Number Line entries for "Multiplication" and "Division". I will also have to point to these entries if I want to link a main note for "Number Line".

Is this alright? Am I underlining appropriately? When do I not underline keyterms? I know that I do these to increase my chances of relating to those notes when I get to reach the concept of Number Lines as I go through the index but I feel like I'm overdoing it, and it's probably bloating it.

I get "Communication (under Info. Theory): '4212/1'" in the beginning because that is one aspect of Communication itself. But for something like the number line, it's very closely associated with arithmetic operations, and maybe I need to rethink how I populate my index.

Presuming, since you're here, that you're creating a more Luhmann-esque inspired zettelkasten as opposed to the commonplace book (and usually more heavily indexed) inspired version, here are some things to think about:<br /> - Aren't your various versions of number line card behind each other or at least very near each other within your system to begin with? (And if not, why not?) If they are, then you can get away with indexing only one and know that the others will automatically be nearby in the tree. <br /> - Rather than indexing each, why not cross-index the cards themselves (if they happen to be far away from each other) so that the link to Number Line (Subtraction) appears on Number Line (Addition) and vice-versa? As long as you can find one, you'll be able to find them all, if necessary.

If you look at Luhmann's online example index, you'll see that each index term only has one or two cross references, in part because future/new ideas close to the first one will naturally be installed close to the first instance. You won't find thousands of index entries in his system for things like "sociology" or "systems theory" because there would be so many that the index term would be useless. Instead, over time, he built huge blocks of cards on these topics and was thus able to focus more on the narrow/niche topics, which is usually where you're going to be doing most of your direct (and interesting) work.

Your case sounds, and I see it with many, is that your thinking process is going from the bottom up, but that you're attempting to wedge it into a top down process and create an artificial hierarchy based on it. Resist this urge. Approaching things after-the-fact, we might place information theory as a sub-category of mathematics with overlaps in physics, engineering, computer science, and even the humanities in areas like sociology, psychology, and anthropology, but where you put your work on it may depend on your approach. If you're a physicist, you'll center it within your physics work and then branch out from there. You'd then have some of the psychology related parts of information theory and communications branching off of your physics work, but who cares if it's there and not in a dramatically separate section with the top level labeled humanities? It's all interdisciplinary anyway, so don't worry and place things closest in your system to where you think they fit for you and your work. If you had five different people studying information theory who were respectively a physicist, a mathematician, a computer scientist, an engineer, and an anthropologist, they could ostensibly have all the same material on their cards, but the branching structures and locations of them all would be dramatically different and unique, if nothing else based on the time ordered way in which they came across all the distinct pieces. This is fine. You're building this for yourself, not for a mass public that will be using the Dewey Decimal System to track it all down—researchers and librarians can do that on behalf of your estate. (Of course, if you're a musician, it bears noting that you'd be totally fine building your information theory section within the area of "bands" as a subsection on "The Bandwagon". 😁)

If you overthink things and attempt to keep them too separate in their own prefigured categorical bins, you might, for example, have "chocolate" filed historically under the Olmec and might have "peanut butter" filed with Marcellus Gilmore Edson under chemistry or pharmacy. If you're a professional pastry chef this could be devastating as it will be much harder for the true "foodie" in your zettelkasten to creatively and more serendipitously link the two together to make peanut butter cups, something which may have otherwise fallen out much more quickly and easily if you'd taken a multi-disciplinary (bottom up) and certainly more natural approach to begin with. (Apologies for the length and potential overreach on your context here, but my two line response expanded because of other lines of thought I've been working on, and it was just easier for me to continue on writing while I had the "muse". Rather than edit it back down, I'll leave it as it may be of potential use to others coming with no context at all. In other words, consider most of this response a selfish one for me and my own slip box than as responsive to the OP.)

1. BNF, NAF 28630, ‘Grand fichier’, 3 January 1975.

Roland Barthes' biographer Tiphaine Samoyault quotes portions of what he calls Barthes' card index diary.

This can also be seen in the published cards which comprise Barthes' Mourning Diary about the period following his mother's death.

Are there other people who've used their card index as a diary the way that some use it for productivity?

syndication link

This statement from a man who claims to work for politicians as an internet troll and propagator of fake news was really striking, because it shows how fabricating something out of the blue can have a profound impact in the elections--something that is supposed to be a democratic process. Now more than ever, mudslinging in popular information spaces like social media can easily sway public opinion (or confirm it). We have seen this during the election season, wherein Leni Robredo bore the brunt of outrageous rumors; one rumor I remember well was that Leni apparently married an NPA member before and had a kid with him. It is tragic that misinformation and disinformation is not just a mere phenomenon anymore, but a fully blown industry. It has a tight clutch on the decisions people make for the country, while also deeply affecting their values and beliefs.

first-century rabbi Eliezer ben Hyrcanus (Mishnah Avot 2:9) and alluded to what some termed on other occasions his ‘marvelous memory for detail’, ‘encyclopedic mind’, or ‘inexhaustible stores of memory’ that allowed him to furnish his ‘convincing array of facts’ 5 (Heller, 1916; L. F., 1919; Mendelsohn, 1916; Schulman, 1922; Stolz, 1921). However, it was perhaps not Deutsch himself who was a ‘cistern’ but instead his card catalogue where he stored drops of data growing to a sea of erudition and which served as a prosthesis for his legendary recall (see Figure 1).

While the practice with his zettelkasten may have been helpful, it's quite likely that given these quotes about his memory that they're evidence of the use of the major system which would have been quite popular and well known at his time, but which isn't now.

The author is going to need to provide evidence one way or another, but I suspect they're not aware of the mnemonic traditions of the time to make the opposite case.

Given the late 1880's time and German and US locations, it's quite likely that Gotthard Deutsch practiced mnemonics and in particular the major mnemonic system.

This quote is tangential evidence of this.

Dwyer, Edward J. “File Card Efficiency.” Journal of Reading 26, no. 2 (1982): 171–171.

Ease of use in writing and grading with short assignments by using 4 x 6" index cards in classrooms.

This sounds like some of the articles from 1912 and 1917 about efficiency of card indexes for teaching.

I'm reminded of some programmed learning texts that were card-based (or really strip-based since they were published in book form) in the 1960s and 1970s. Thse books had small strips with lessons or questions on the front with the answers on the reverse. One would read in strips through the book from front to back and then start the book all over again on page one on the second row of strips and so on.

Goutor defines self-help notes as notes which one would use to refresh their memory about what remains to be done or researched, problems that remain to be solved, or information which is needed to be researched or found. (p26) These are akin in some sense to what I call "open questions". He also indicates that these notes might be triggered by one's daily activities or occasional musings which relate to one's project but occur outside of its active pursuit. In this sense, they have a similar feel to the idea of Ahrens' fleeting notes, but in Goutor's practice they aren't defined as occurring while one is doing active reading or research.

He suggests that one keeps these notes in a separate area so that they might be systematically and regularly visited for review, further research, or answering as the opportunities to do so present themselves. Once the questions have been answered and appropriate notes updated or added, these self-help notes can be discarded.

System liczbowy i to, jak zapisujemy cyfry, liczby, określone wartości.

consider these, but not too early in your design process

In a break from the more traditional subject heading filing system of many commonplacing and zettelkasten methods, in addition to this sort of scheme Heyde also suggests potentially using the Dewey Decimal System for organizing one's knowledge.

While Luhmann doesn't use Dewey's system, he does follow the broader advice which allows creating a dense numbering system though he does use a different numbering scheme.

that the sheetification can also be done based on other principles.

Heyde specifically calls the reader to consider other methods in general and points out the Dewey Decimal Classification system as a possibility. This suggestion also may have prompted Luhmann to do some evolutionary work for his own needs.

!- definition : citizen action network (CAN) !- question : rapid whole system change at community scale - Can CAN's scale globally for rapid whole system change? If so, how?

The Noguhchi Filing System is a method developed by Noguchi Yukio, a Japanese economist, that organizes one's projects using envelopes and sorts them based on the frequency upon which you work on them.

Lesser known by whose estimation? Certainly lesser known in America in 2014 (and even now in 2022), but how popular was/is it in Japan or other locations?

https://web.archive.org/web/20120122115952/http://pileofindexcards.org/blog/2006/10/13/one-pocket-rule/

Noguchi Yukio had a "one pocket rule" which they first described in “「超」整理法 (cho seiri ho)”. The broad idea was to store everything in one place as a means of saving time by not needing to search in multiple repositories for the thing you were hunting for. Despite this advice the Noguchi Filing System didn't take complete advantage of this as one would likely have both a "home" and an "office" system, thus creating two pockets, a problem that exists in an analog world, but which can be mitigated in a digital one.

The one pocket rule can be seen in the IndieWeb principles of owning all your own data on your own website and syndicating out from there. Your single website has the entire store of all your material which makes search much easier. You don't need to recall which platform (Twitter, Facebook, Instagram, et al.) you posted something on, you can save time and find the thing much more quickly by searching one place.

This principle also applies to zettelkasten and commonplace books (well indexed), which allow you to find the data or information you put into them quickly and easily.

!- conclusion : GCC - very important finding - nobody knows the implications of such a profound shift - it means we are profoundly dependent on culture, on artificial human-created adaptations for our survival !- in other words : GCC - we no longer genetically evolve to adapt, but rather cognitive create solutions to adapt!

!- for : Deep Humanity - intriguing result with important implications on cultural evolution

Tillman, Ruth Kitchin. Indispensable, Interdependent, and Invisible: A Qualitative Inquiry into Library Systems Maintenance. College and Research Libraries Journal. January 2023

Author's accepted manuscript copy

What does it mean "an always online cryptographic system"

NDR. (2021, March 19). AstraZeneca: Greifswalder Forscher finden Thrombose-Ursache. /nachrichten/mecklenburg-vorpommern/AstraZeneca-Greifswalder-Forscher-finden-Thrombose-Ursache,coronavirus4660.html

Johnson, S. (2021, June 7). Spat at, abused, attacked: Healthcare staff face rising violence during Covid. The Guardian. http://www.theguardian.com/global-development/2021/jun/07/spat-at-abused-attacked-healthcare-staff-face-rising-violence-during-covid

Reuters. (2021, August 23). Germany drops incidence levels as key COVID yardstick. Reuters. https://www.reuters.com/world/europe/german-drop-incidence-levels-key-covid-yardstick-sources-2021-08-23/

Zimmer, C. (2021, June 6). We’ll Probably Need Booster Shots for Covid-19. But When? And Which Ones? The New York Times. https://www.nytimes.com/2021/06/06/science/covid-vaccine-boosters.html

EMERGENCY STATEMENT ON OMICRON: 15 DECEMBER 2021 | Independent SAGE. (2021, December 15). https://www.independentsage.org/emergency-statement-on-omicron-15-december-2021/

Huang, L., & Cao, B. (2021). Post-acute conditions of patients with COVID-19 not requiring hospital admission. The Lancet Infectious Diseases, 0(0). https://doi.org/10.1016/S1473-3099(21)00225-5

Gallagher, J. (2021, November 14). Covid vaccine ‘waning immunity’: How worried should I be? BBC News. https://www.bbc.com/news/health-59260294

Atari, M., Reimer, N. K., Graham, J., Hoover, J., Kennedy, B., Davani, A. M., Karimi-Malekabadi, F., Birjandi, S., & Dehghani, M. (2021). Pathogens Are Linked to Human Moral Systems Across Time and Space. PsyArXiv. https://doi.org/10.31234/osf.io/tnyh9

Polis. (n.d.). Retrieved April 26, 2022, from https://pol.is/home

ReconfigBehSci. (2021, December 17). RT @EricTopol: No evidence that Omicron is less severe, new @imperialcollege study reports https://ft.com/content/020534b3-5a54-4517-9fd1-167a5db50786 https://t.co/5YYzJ6tVtc [Tweet]. @SciBeh. https://twitter.com/SciBeh/status/1472156681098469380

ReconfigBehSci. (2021, December 15). RT @CaulfieldTim: Check out the #OpenWHO course “#Infodemic Management 101” https://openwho.org/courses/infodemic-management-101 via @WHO @TDPurnat cc @ScienceUpFirst @… [Tweet]. @SciBeh. https://twitter.com/SciBeh/status/1471132916445061130

Bor, A., Jørgensen, F. J., & Petersen, M. B. (2021). The COVID-19 Pandemic Eroded System Support But Not Social Solidarity. PsyArXiv. https://doi.org/10.31234/osf.io/qjmct

Pouria Hadjibagheri [@Pouriaaa]. (2021, July 14). The state of the UK’s statistical system 2020/21 by @StatsRegulation Thank you! 🎊😀🎉 See the report: Https://osr.statisticsauthority.gov.uk/publication/the-state-of-the-uks-statistical-system-2020-21/pages/8/ https://t.co/dEBmVz3oTm [Tweet]. Twitter. https://twitter.com/Pouriaaa/status/1415371346775838725

While Heyde outlines using keywords/subject headings and dates on the bottom of cards with multiple copies using carbon paper, we're left with the question of where Luhmann pulled his particular non-topical ordering as well as his numbering scheme.

While it's highly likely that Luhmann would have been familiar with the German practice of Aktenzeichen ("file numbers") and may have gotten some interesting ideas about organization from the closing sections of the "Die Kartei" section 1.2 of the book, which discusses library organization and the Dewey Decimal system, we're still left with the bigger question of organization.

It's obvious that Luhmann didn't follow the heavy use of subject headings nor the advice about multiple copies of cards in various portions of an alphabetical index.

While the Dewey Decimal System set up described is indicative of some of the numbering practices, it doesn't get us the entirety of his numbering system and practice.

One need only take a look at the Inhalt (table of contents) of Heyde's book! The outline portion of the contents displays a very traditional branching tree structure of ideas. Further, the outline is very specifically and similarly numbered to that of Luhmann's zettelkasten. This structure and numbering system is highly suggestive of branching ideas where each branch builds on the ideas immediately above it or on the ideas at the next section above that level.

Just as one can add an infinite number of books into the Dewey Decimal system in a way that similar ideas are relatively close together to provide serendipity for both search and idea development, one can continue adding ideas to this branching structure so they're near their colleagues.

Thus it's highly possible that the confluence of descriptions with the book and the outline of the table of contents itself suggested a better method of note keeping to Luhmann. Doing this solves the issue of needing to create multiple copies of note cards as well as trying to find cards in various places throughout the overall collection, not to mention slimming down the collection immensely. Searching for and finding a place to put new cards ensures not only that one places one's ideas into a growing logical structure, but it also ensures that one doesn't duplicate information that may already exist within one's over-arching outline. From an indexing perspective, it also solves the problem of cross referencing information along the axes of the source author, source title, and a large variety of potential subject headings.

And of course if we add even a soupcon of domain expertise in systems theory to the mix...

While thinking about Aktenzeichen, keep in mind that it was used in German public administration since at least 1934, only a few years following Heyde's first edition, but would have been more heavily used by the late 1940's when Luhmann would have begun his law studies.

https://hypothes.is/a/CqGhGvchEey6heekrEJ9WA

When thinking about taking notes for creating output, one can follow one thought with another logically both within one's card index not only to write an actual paper, but the collection and development happens the same way one is filling in an invisible outline which builds itself over time.

Linking different ideas to other ideas separate from one chain of thought also provides the ability to create multiple of these invisible, but organically growing outlines.

Portions of Dewey's system as described here can definitely be seen in Luhmann's system in which he left some of the preceding numbers unwritten/unstated.