WorkCharles Sanders Peirce

Some Consequences of Four Incapacities

Against Descartes: you cannot doubt on command, and reasoning should be a cable of many slender fibres rather than a chain no stronger than its weakest link.

by Charles Sanders Peirce46 passages held

  • English, the original language, and your language
First published
(aged 29)
Original language
English

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Overview

Descartes had told philosophy to begin by doubting everything and to end by trusting whatever the individual mind finds clear. Peirce opens by naming him, sets out four things Cartesianism teaches, and answers all four. Universal doubt cannot be obeyed as an instruction, because a doubt has to be real to do any work; you begin with the prejudices you actually hold and give one up when something forces you to. The individual is the wrong court of appeal, since the mark of a science is that its practitioners come to agree, and if candid minds examine your theory and reject it, that should shake you. Reasoning ought not to be a chain, no stronger than its weakest link, but a cable of fibres that may be slender so long as there are many of them and they are closely wound. From there the consequences run fast. Every mental act is an inference, of one of three sorts — deduction, induction, hypothesis; the real is whatever a community of inquirers would settle on in the long run, so that reality has a community built into its very definition; generals are therefore real, which puts Peirce with the medieval realist Duns Scotus against the nominalist Ockham; and the mind itself turns out to be a sign, developing by the laws of inference, so that a man and the words he uses are less different than he supposes. It is the longest of the three papers on cognition he wrote for W. T. Harris's Journal of Speculative Philosophy, and it ends on three lines of Shakespeare. Twenty-four years later he took two words of them for the title of Man's Glassy Essence.

Key concepts

What four things does Peirce say Cartesianism teaches?

Begin by doubting everything; look to the individual consciousness for the test of certainty; run an argument on a single thread of inference; and leave much unexplained by declaring it inexplicable. He answers each of the four in turn, and those replies are the frame the rest of the paper is built on.

Why should reasoning be a cable rather than a chain?

Because a chain is no stronger than its weakest link, and no premiss in philosophy is strong enough to carry a whole argument by itself. A cable of many slender fibres, closely wound, holds although no single fibre would. The claim is not modesty: it is that independent reasons genuinely add together, while the links of one inference do not.

Why does Peirce side with Duns Scotus against the nominalists here?

That a kind or a law is something in the world, not merely a name we apply to things that resemble one another. This puts him with the medieval realist Duns Scotus against Ockham's nominalism, a quarrel he treats as live rather than antiquarian. It follows from defining the real as what a community of inquirers would finally settle on.

Are all our mental acts really inferences, and of what kinds?

Peirce claims every mental act is an inference, of one of three sorts — deduction, induction and hypothesis. The three-way division is already here in 1868, ten years before the essay that made it famous. What this paper leans on is the word "every": if nothing is left over, no thinker stands behind the inferences doing them.

Why is the individual mind the wrong place to settle a question?

Because the mark of a science is that its practitioners come to agree, and a lone inquirer has no way of checking himself. If candid minds examine your theory and reject it, that should shake you. Peirce writes the community into the definition of reality itself, so that inquiry becomes something people do together or not at all.

Themes of the book

What this book returns to, gathered into themes and ordered by how much of the text each one occupies.

Doubt You Cannot Manufacture

Descartes told philosophy to begin by doubting everything and to end with whatever the individual mind finds clear. Peirce answers that a doubt has to be real before it can do any work, and that the lone mind is the wrong court to settle anything in.

Four Cartesian instructions are answered one at a time, and the replacement image carries the case: not a chain, no stronger than its weakest link, but a cable of slender fibres closely wound. Certainty is nowhere available and turns out not to be needed, because inquiry is something a community does and agreement among candid investigators is the only mark a science has. One gives up a prejudice when something forces it, not on command.

  • fallibilism
  • logic
  • inference
  • deduction
  • induction
  • hypothesis
  • syllogism
  • fallacies
  • judgment
  • metaphysics

The Man and His Words Are One Sign

If every mental act is an inference and every thought a sign, what is left of the self that was supposed to be doing the thinking? The answer puts reality and personhood on the same footing.

Deduction, induction and hypothesis exhaust the mind's operations, so no faculty remains over to be a thinker standing apart from them. The real is defined as whatever a community of inquirers is fated to settle on, which makes generals real and places Peirce with Duns Scotus against Ockham's nominalism. The self follows from both: a man is a sign developing under the laws of inference, differing from the words he uses less than his vanity supposes.

  • semiotics
  • signs
  • representation
  • philosophy of mind
  • consciousness
  • meaning
  • cognition
  • language
  • mental imagery
  • reality
  • truth
  • being

Within this work

passages held
46
distinct concepts
105
by passages held, corpus-wide
#663

What this book thinks together

The wheel takes this book’s leading concepts and shows how often they come up together. The wider the band between two, the more of its passages speak of both. Among them, most often together: “consciousness” and “philosophy of mind”.
Concept co-occurrence, strongest first 8 concepts, joined by 19 pairings. 63 pairings reach beyond these concepts and are not drawn.
ConceptPaired conceptShared passages
consciousnessphilosophy of mind4
consciousnesssemiotics4
inferencelogic4
meaningphilosophy of mind4
meaningsemiotics4
philosophy of mindsemiotics4
representationsemiotics4
consciousnessinference3
consciousnessmeaning3
inferencephilosophy of mind3
philosophy of mindrepresentation3
hypothesislogic2
inferencesemiotics2
meaningrepresentation2
consciousnessrepresentation1
hypothesisinference1
inferencemeaning1
inferencerepresentation1
logicphilosophy of mind1

Works held

The author's work in order, this book marked in place. Your-language title first, the original beneath it where the two differ; side chips show which full texts are held.

  1. 1867 On a New List of Categories

    The earliest item on this shelf, and the root of everything after it: the three-part scheme of quality, relation and representation reappears in the logic papers of 1877–78 and again in the evolutionary cosmology of the 1890s.

    EN
  2. 1868 Questions Concerning Certain Faculties Claimed for Man

    Where Peirce clears the ground. The four denials reached here — no intuition, no introspection, no thought without signs, no conception of the incognizable — are restated as premisses at the head of the sequel.

    EN
  3. 1868 Some Consequences of Four Incapacities you are here EN
  4. 1877 The Fixation of Belief

    Written for readers with no philosophy behind them: the first instalment of a six-part course in the logic of science, serialised in a general-interest monthly. Everything the other 1877–78 papers do rests on the account of doubt, belief and inquiry set out here.

    EN
  5. 1878 Deduction, Induction, and Hypothesis

    The paper that ends the series. Its central idea — guessing, treated as an inference with rules of its own rather than as a lack of them — is what Peirce kept working at for the rest of his life.

    EN
  6. 1878 How to Make Our Ideas Clear

    The second instalment of the 1877–78 series, nominally about a dead distinction in the logic textbooks. Two decades after it was printed, the American pragmatists took it as their charter.

    EN
  7. 1878 The Doctrine of Chances

    Third in the series, and the point where the account of inquiry acquires a price. Half of it is arithmetic — card packs, whist hands, insurance offices — and the other half asks whether a creature who never lives to complete a run of trials may reason from probabilities at all.

    EN
  8. 1878 The Order of Nature

    The religious instalment of the 1877–78 series. It reaches forward to the essay Peirce published at the end of his life: both ask what a scientific habit of mind is entitled to say about God, and they give different answers.

    EN
  9. 1878 The Probability of Induction

    A general magazine's readers are asked here to check a table of black and white balls for themselves. It is the most technical stretch of the 1877–78 series, and the one that takes on the probability textbooks directly.

    EN
  10. 1891 The Architecture of Theories

    A prospectus rather than a treatise, and the first of the five articles of Peirce's metaphysical series in Paul Carus's Monist, 1891–93 — the run in which the cosmology it sketches was built.

    EN
  11. 1892 Man's Glassy Essence

    Three things that do not obviously belong together — the constitution of matter, the chemistry of living tissue, and the question whether a church or a crowd can think — joined by the argument that mind and matter differ only in which side you look from.

    EN
  12. 1892 The Doctrine of Necessity Examined

    It stands second in the series, and it is the one that started a quarrel: Carus attacked it twice in his own journal and Peirce defended it once, so that the argument about chance occupied The Monist for fifteen months.

    EN
  13. 1892 The Law of Mind

    Where tychism acquires its partner. The chance of the April paper needed continuity to work in, and continuity gets its name and its defence here — the idea Peirce came to regard as the one his philosophy could least do without.

    EN
  14. 1893 Evolutionary Love

    Here the cosmology turns into an argument about how people ought to live: chance, necessity and love applied to the history of ideas, and to the ethics of a commercial century. It closed the Monist series.

    EN
  15. 1893 What is Christian Faith?

    Addressed past the theologians to two audiences at once — churchmen keeping their membership narrow, and the scientifically educated, shut out of the churches, who were talking about founding one of their own.

    EN
  16. 1899 Leibniz Rewritten

    The one book review on this shelf, from the years after the Coast Survey when Peirce lived partly by notices and dictionary work. It is the only piece here in which he is weighing someone else's system rather than building his own.

    EN
  17. 1908 A Neglected Argument for the Reality of God

    Thirty years after the logic papers and fifteen after the cosmology, Peirce turns the machinery of hypothesis on the question the 1878 series had left open.

    EN
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