Peirce

Charles Sanders Peirce

Before you ask whether a belief is true, ask how you came by it. In the autumn of 1877, in a magazine read by farmers and engineers, an American scientist named Charles Sanders Peirce catalogued the ways human beings actually settle their opinions, and the catalog has not aged a day. You can hold a belief by sheer grip, refusing to look at anything that might disturb it: he called this the method of tenacity, and admired its restfulness. An institution can settle your beliefs for you and punish deviation: the method of authority, which he credited, with a straight face, as the builder of civilizations. A culture can drift toward whatever seems "agreeable to reason," elegant, fashionable, comfortable: the a priori method, which produces metaphysical systems the way taste produces fashions. Each method works until it meets another mind. The tenacious believer discovers other believers; the authoritative state discovers other states; the fashionable philosopher discovers the next fashion. Only one method, Peirce argued, lets something other than ourselves cast the deciding vote: the method of science, which stakes everything on a single hypothesis, that there are real things whose characters are entirely independent of our opinions about them. "The Fixation of Belief" reads less like a Victorian essay than like a field manual for the present information climate, written a century and a half in advance.

The man who measured the world. Peirce came to philosophy as a working scientist, and never stopped insisting that this was the right door. Born in 1839 in Cambridge, Massachusetts, the son of Benjamin Peirce, Harvard's commanding mathematician, he was drilled from boyhood in problems and proofs, took a chemistry degree summa cum laude from the Lawrence Scientific School in 1863, and then spent thirty years with the United States Coast and Geodetic Survey, swinging precision pendulums at stations from Paris to Hoboken to measure minute variations in the strength of gravity. He ran some of the earliest controlled psychophysics experiments in America with his student Joseph Jastrow, introducing randomization into experimental design along the way. He wrote thousands of definitions for the Century Dictionary. For five years, from 1879 to 1884, he lectured on logic at Johns Hopkins, the only university post he ever held; his students there included John Dewey and Christine Ladd-Franklin, and with another of them, O. H. Mitchell, he worked out the logic of quantifiers independently of Frege. Back in 1872, in Cambridge, he and William James and the future Justice Oliver Wendell Holmes had argued philosophy in a little circle they half-jokingly called the Metaphysical Club; the word "pragmatism" was first spoken there. From 1887 he wrote from an old farmhouse called Arisbe in Milford, Pennsylvania, producing the bulk of the eighty thousand manuscript sheets that editors are still mining today.

The pragmatic maxim. "How to Make Our Ideas Clear" (1878) opens by teasing the logicians, Descartes above all, for treating clarity as a feeling: an idea counted as clear if you were comfortable with it. Peirce proposed a third grade of clearness beyond familiarity and abstract definition, and stated it as a rule: consider what effects, which might conceivably have practical bearings, we conceive the object of our conception to have; then our conception of these effects is the whole of our conception of the object. That sentence, the pragmatic maxim, is the founding sentence of America's one homegrown philosophical movement. To call a diamond hard is to say nothing more than what would happen if you tried to scratch it; to call a body heavy is to say how it will fall; ask what force is, and the maxim dissolves the metaphysical fog into the measurable facts of acceleration. Notice what the maxim is about: meaning. It is a logician's instrument for making ideas clear, a test for whether two disputants differ in substance or only in vocabulary. It is not a license to believe whatever pays. When William James later credited Peirce publicly with founding pragmatism and then bent the doctrine toward the will to believe and the cash value of ideas, Peirce recoiled, and in 1905 renamed his own position "pragmaticism," a word he judged ugly enough to be safe from kidnappers.

Truth and the community. The same essay carries his most consequential idea. Inquirers who start from the most antagonistic standpoints find, as evidence accumulates, that their conclusions converge; thought is "carried, not where we wish, but to a fore-ordained goal." Then the definition: "The opinion which is fated to be ultimately agreed to by all who investigate, is what we mean by the truth, and the object represented in this opinion is the real." He footnotes the dangerous word: fate here means nothing superstitious, only that which is sure to come about. Truth, on this account, is not what works for me; it is what the unlimited community of investigators would settle on in the long run, and reality is what that destined opinion represents. The definition makes knowledge an essentially social enterprise, the exact inversion of Descartes' solitary meditator certifying his ideas alone in a heated room. It also puts every actual belief on probation, since none of us lives in the long run: Peirce named that posture fallibilism, and made it the working ethics of science. "The Doctrine of Chances" grounds it in a startling argument: because any single inference may fail, logicality itself requires that our interests not be confined to our own case; the reasoner who will not identify with an unlimited community is, Peirce says, illogical in all his inferences. "Logic is rooted in the social principle."

The logic of guessing. "Deduction, Induction, and Hypothesis" (1878) closes the first series with his most original contribution to logic. Take a bag of beans. Deduction applies a rule: all the beans from this bag are white; these beans are from this bag; so these beans are white. Induction generalizes from a sample: these beans are from this bag; these beans are white; so probably all the beans in this bag are white. But there is a third rotation of the same syllogism, scarcely noticed by the textbooks: finding white beans spilled on the table beside a bag known to hold white beans, I infer that these beans came from that bag. Peirce calls this inference hypothesis; in later writings he would call it abduction. It is the weakest of the three forms, and the only one that ever introduces a new idea. Deduction proves what must be; induction measures how often; abduction alone explains. He illustrates it with himself stepping ashore at a Turkish seaport and inferring, from the canopy and the four horsemen, that the rider beneath it is the governor of the province. Every medical diagnosis, every detective's reconstruction, every scientific theory begins as exactly this kind of disciplined guess, and a century later researchers in artificial intelligence would adopt Peirce's own term for the inference their machines lacked.

Chance, love, and a growing universe. The second half of the room is wilder. In five papers for The Monist (1891-93), the exact logician proposed that the universe itself is still under construction. Against "the doctrine of necessity," the reigning assumption that every fact is fixed in advance by mechanical law, Peirce argued that absolute chance is real: the laws of nature are statistical regularities, and the small irregularities are not all errors of measurement but the world's surviving spontaneity. He called the thesis tychism, from the Greek word for chance. Laws themselves, he proposed, are habits the universe has acquired; "matter is effete mind, inveterate habits becoming physical laws." "The Law of Mind" names the complementary principle, synechism: ideas are not atoms but continuities that spread, lose intensity, gain generality, and weld into the systems we call personalities. "Evolutionary Love" completes the architecture with agapism, the claim that alongside evolution by chance and evolution by mechanical necessity there is evolution by creative love, and it aims its polemic squarely at what Peirce called the Gospel of Greed, the political economy of his century that had promoted self-interest into a cosmic principle. He knew which tradition he was joining: he describes his position in these papers as a "Schelling-fashioned idealism," and recalls growing up in Cambridge while Emerson and the transcendentalists were filling the New England air with ideas. The most rigorous logician in America held the most adventurous cosmology in America, and he offered it not as a creed but as a working hypothesis, architecture for inquiries designed to outrun him.

What this room reads. The corpus behind this room is Chance, Love, and Logic (1923), the collection in which Morris R. Cohen first gathered Peirce's two great magazine series into a book: the six "Illustrations of the Logic of Science" from Popular Science Monthly (1877-78), the five Monist papers (1891-93), Cohen's introduction, and a supplementary essay by John Dewey on Peirce's pragmatism. Peirce wrote in English, so no translator stands between you and the text; the edition is public domain, read here in the Project Gutenberg transcription. Cite by essay title, year, and internal section ("The Fixation of Belief" (1877) §V; "How to Make Our Ideas Clear" (1878) §IV). What the room does not carry is the vast remainder. The Collected Papers (1931-1935 and 1958), whose CP numbering is the scholarly standard, remain under copyright; the 1867 paper on the categories, the 1868-69 anti-Cartesian essays, the 1903 Harvard lectures, and nearly all of the writings on signs likewise sit outside this corpus. Ask the chat about Firstness, Secondness, and Thirdness, about icon, index, and symbol, or about the existential graphs, and it will answer from the general scholarship and tell you it is doing so.

Peirce defined truth as the opinion the community of inquiry is destined to reach in the long run, and by his own standard his philosophy is still in its short run. The chronological edition of his writings, begun in the 1970s, is decades from completion; the eighty thousand sheets keep yielding. Meanwhile the ideas keep arriving ahead of schedule. Fallibilism became the working self-description of twentieth-century science. Abduction became a term of art in artificial intelligence, in medical reasoning, in the philosophy of discovery. The theory of signs he sketched in scattered papers grew into a discipline. Statisticians trace the randomized experiment to his laboratory, logicians the quantifier to his notation. And every time someone notices that you cannot fix belief by clutching it harder, or that no authority can decree what is real, the diagnosis of 1877 is running again. He asked of every idea the question his maxim asks: what conceivable difference would it make? The difference his own ideas make is still compounding; the long run he wrote about is the one we are living in.