A liberal-arts library

Learn it.
Prove it.

SizzlinShred is a free library for studying and learning the truth: how to reason, read and prove; mathematics and languages; health; engineering; and music, the oldest experimental science. Every page is linked to its neighbours, every claim is labelled by how well it is known, and many ideas can be heard, played or tested right here.

A string vibrating in its first three modes: the whole length, halves and thirds 1 2 3
One string, three modes. Halve the length and the pitch rises an octave (2:1). Take a third and you get a fifth above that (3:2). Every harmony you hear starts here, and so does the habit of explaining the world with ratios.
The wings

Eight ways in. One map.

Each wing stands on its own, but the links between them are the point: the habit that checks a proof is the habit that tests a nutrition claim and the habit that troubleshoots a network.

  1. 14 pages

    Liberal Arts & Reasoning

    Liberal Arts and Reasoning is the part of the library about how to think well, read deeply and judge wisely.

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  2. Interactive

    Logic & Proof

    Definitions, Euclid's postulates, thirteen 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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  3. 14 pages

    Mathematics, Systems & Languages

    Mathematics, Systems and Languages is the wing for learning to think precisely and say it well.

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  4. 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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  5. Interactive

    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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  6. 11 pages

    Health & Nutrition

    The Health and Nutrition wing treats the body as the instrument every other study depends on.

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  7. 9 pages

    Engineering & Career

    Engineering and Career is the wing where the liberal arts meet working practice.

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  8. 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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See the full map of contents

The bridge: Science

Hear a ratio.

The first experiment in the history of science was musical. The Pythagoreans noticed that pleasing intervals come from simple whole-number ratios of string length. Press a button to hear two tones in that ratio together.

Both tones start on A3 (220 Hz). You hear the ratio itself, built from pure tones.

More at the Science page →
Today

Thirty minutes. Four blocks.

  1. 00–05 Monochord warm-up. C major up and down one string, one finger.
  2. 05–15 Interval study. Diatonic 6ths on the G and high E strings.
  3. 15–25 Triad pairs. C and D triads over a C drone (Lydian).
  4. 25–30 3 against 4. Accent every third eighth note.
Start the timer
Sentence of the day
We learn not for life but for school.
Seneca, Epistulae Morales 106.12 Attested

A complaint, not a motto: Seneca is attacking education that produces cleverness rather than conduct.

Browse the canon →