A map of everything here.
52 linked pages across 9 wings: reasoning, mathematics, health, engineering, music and the science that connects them. Every page links to its neighbours and lists the pages that link back to it, so you can follow an idea wherever it leads.
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15 pages
Liberal Arts & Reasoning
Liberal Arts and Reasoning is the part of the library about how to think well, read deeply and judge wisely.
- Liberal Arts and Reasoning: Start Here
- The Philosopher-Engineer: Study and Workshop Together
- The Weekly Loop: Read, Reconstruct, Make, Defend, Log
- How to Read a Great Book: Levels, Modes and the Completion Standard
- Principles Ledger and Question Arcs
- Peirce on the Fixation of Belief
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Interactive
Logic & Proof
Definitions, Euclid's postulates, fifteen propositions proved step by step, Plato's Divided Line and a Socratic cross-examination you can run on your own beliefs.
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17 pages
Mathematics, Systems & Languages
Mathematics, Systems and Languages is the wing for learning to think precisely and say it well.
- Mathematics: Start Here
- A Map of Mathematics: Twenty-Five Areas and What Depends on What
- Placement, Repair and Retention: Keeping Mathematics Alive
- Learning Mathematics: Procedures and the Six Abilities
- Proof and Precise Reasoning: From Arguments to Theorems
- Algebra: The Skills That Carry Everything
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Interactive
The Science of Sound
Where number becomes something you can hear: pure and tempered intervals, beats, the Pythagorean comma, the harmonic series and the physics of strings.
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The Astronomy Lab
Astronomy, the art of magnitude in motion, made hands-on: why the seasons come from the Earth's tilt, how the Moon's phases work, how Eratosthenes measured the Earth with a shadow, why Mars seems to go backwards, and Kepler's laws checked against real planetary data.
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Music & Guitar
Guitar practised like an experiment: one string, then two, then the whole neck, a 30-minute daily ritual, and working instruments: tuner, metronome, drone, fretboard and monochord.
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11 pages
Health & Nutrition
The Health and Nutrition wing treats the body as the instrument every other study depends on.
- Health and Nutrition: Start Here
- Strength Training for Busy Lives: The Recovery-Based Cycle
- Daily Walking and Easy Cardio
- A Plant-Based Eating Framework You Can Repeat
- The Daily Dozen and Roles Over Ingredients
- Protein for Muscle on a Plant-Based Diet
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9 pages
Engineering & Career
Engineering and Career is the wing where the liberal arts meet working practice.
- Engineering and Career: Start Here
- Deliberate Practice: Choose Targets You Can Observe
- Evidence-Based Troubleshooting: Separating Explanations
- Stale Information and Dependable Reports
- Quantitative Reasoning with Stated Assumptions
- Working with AI Coding Agents: A Disciplined Loop
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Interactive
The Canon
Sixty-seven sentences worth knowing, from the Presocratics to the present, each cited to its source and graded for how reliable the attribution is.
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Follow a question across the wings
- 8 steps · 4 wingsHow Do I Know Anything?How do I know anything at all, and how sure should I be?
- 6 steps · 4 wingsReal Finding or Hype?How do you tell a real finding from hype, even when the hype is your own?
- 8 steps · 5 wingsFrom a Vibrating String to a ProofWhy can a guitar never be perfectly in tune with itself, and how can we be sure?
- 6 steps · 5 wingsLearning Faster, and Making It StickHow can I learn anything faster, and be sure it stuck?
- 7 steps · 5 wingsFrom a Hard Book to a Clear PageHow do I get the meaning out of a difficult book, and onto a page someone else can use?
- 7 steps · 5 wingsThinking Like an EngineerWhat does it mean to think like an engineer, and what can anyone borrow from it?
- 8 steps · 4 wingsA Body and Mind That LastWhat does it take to stay strong, well and sharp for decades rather than weeks?
- 8 steps · 5 wingsReasoning with MachinesHow do you reason well with, and about, machines that reason fluently?