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A System of Logic

A System of Logic, Ratiocinative and Inductive

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Mill — The structure of comparison, not only the count

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Can one well-designed contrast provide stronger grounds than a thousand identical records?

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  1. 1

    Mill treats induction as inference from observed cases to unobserved cases, or cases at other times, that resemble them in specified respects.

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    • A System of Logic, Ratiocinative and Inductive

      John Stuart Mill · Project Gutenberg text based on the eighth edition

      Locator: Book III, chapter I §2 and chapter II §1

      Open source
  2. 2

    He holds that simple enumeration without a counterexample is inadequate in many scientific inquiries where there is no assurance that a counterexample, if present, would have been found.

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    • A System of Logic, Ratiocinative and Inductive

      John Stuart Mill · Project Gutenberg text based on the eighth edition

      Locator: Book III, chapter III §2

      Open source
  3. 3

    Mill presents as a central problem for a theory of induction why one case can sometimes be strong while countless agreeing cases can remain weak.

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    • A System of Logic, Ratiocinative and Inductive

      John Stuart Mill · Project Gutenberg text based on the eighth edition

      Locator: Book III, chapter III §3

      Open source
  4. 4

    Observed sequence alone may not exclude a common cause; Mill argues that experiments comparing outcomes under arranged conditions can strengthen causal judgment.

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    • A System of Logic, Ratiocinative and Inductive

      John Stuart Mill · Project Gutenberg text based on the eighth edition

      Locator: Book III, chapter VII §§3–4

      Open source
  5. 5

    The Method of Agreement compares a condition shared by several instances of a phenomenon, while the Method of Difference compares occurrence and non-occurrence cases with other differences controlled.

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    • A System of Logic, Ratiocinative and Inductive

      John Stuart Mill · Project Gutenberg text based on the eighth edition

      Locator: Book III, chapter VIII §§1–4

      Open source
    • John Stuart Mill

      Stanford Encyclopedia of Philosophy

      Locator: Section 3.3

      Open source
  6. 6

    Because of background conditions and multiple causes, results from these methods must be applied cautiously and remain open to further observation.

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    • John Stuart Mill

      Stanford Encyclopedia of Philosophy

      Locator: Section 3.3

      Open source
    • A System of Logic, Ratiocinative and Inductive

      John Stuart Mill · Project Gutenberg text based on the eighth edition

      Locator: Book III, chapters VIII and X

      Open source
  7. 7

    The first edition of `A System of Logic` was published in two volumes by John W. Parker in London in 1843.

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    • A System of Logic, Ratiocinative and Inductive, Volume II

      John Stuart Mill · 1843 · London: John W. Parker, first edition, volume 2; Oxford University scan

      Locator: Title page and publisher metadata, volume 2

      Open source
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  1. 1843

    The first edition of A System of Logic is published in two volumes in London.

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