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Merely Anecdotal: Dewey, Warranted Assertibility, and the Philosophy of Practice Knowledge

American pragmatism supplies the missing philosophy of practice knowledge, and it answers the charge that professional experience is a softer kind of evidence.

American Pragmatism and the Philosophy of Inquiry

Practice knowledge has a credibility problem, and the problem is philosophical before it is rhetorical. Next to a controlled trial or a formal proof, what a practitioner knows sounds provisional, anecdotal, and suspiciously dependent on the person who knows it. I will argue that the answer to that charge is a hundred and fifty years old and thoroughly "American." I will show how Peirce, James, and Dewey built an account of inquiry in which knowledge tested in action is how truth actually gets made.

Charles Sanders Peirce starts it. In "The Fixation of Belief" (1877) he asks which method for settling belief actually works, and he lines up the candidates. Tenacity holds a belief by stubbornness. Authority believes what an institution says. The a priori method trusts whatever seems agreeable to reason, though what seems self-evident drifts with fashion. Against all three Peirce argues for the method of science, the only one answerable to a reality independent of what any of us wants. It is also the only one that is self-correcting, because a whole community of inquirers keeps testing it. From this comes the pragmatic maxim: to understand an idea clearly, trace its practical effects, what difference it would make and to whom if it were true. Peirce pairs the maxim with fallibilism, the position that no belief is beyond revision. Fallibilism is not a weakness in his account. It is the engine.

William James makes the maxim public. In the 1907 lectures published as Pragmatism, he argues we test a belief's meaning and its truth the same way, by workability, by what he calls its "cash value" in experience. An idea is true to the extent that it pays its way: it guides action, it hangs experience together, it survives contact with what happens when you act on it. That standard is not the relativism of the caricature. James asks a harder question of every claim, including a best-practice claim: does this work, under real conditions, tested by people with something at stake? Citing the right authority is an easier bar, not a higher one.

A felt difficulty, tested in action

John Dewey is where this lands. In How We Think (1910) he describes reflective thinking as a pattern that begins not in abstraction but in a felt difficulty, a snag hit in the middle of doing something. From the snag the thinker locates and defines the problem, proposes a working hypothesis, reasons out its implications, tests it in action, and revises. Thinking worth the name does not start in a library; it starts in a swamp.

Then, in Logic: The Theory of Inquiry (1938), Dewey proposes trading the word "truth," with its baggage of a frozen mirror-match to reality, for a working phrase: warranted assertibility. A claim earns the right to be asserted because disciplined inquiry into a real problem has warranted it, for now, under these conditions, subject to further testing. That phrase is the single most useful piece of vocabulary in the tradition. It is simply the pragmatist name for evidence-in-practice.

The inheritance is direct rather than a loose family resemblance. Donald Schön's The Reflective Practitioner (1983) gave the professions reflection-in-action and reflection-on-action, the practitioner thinking on her feet in the swampy lowlands, adjusting mid-move rather than only afterward. Schön builds explicitly on Dewey; the felt-difficulty loop becomes, in a professional's hands, improvisational judgment. Cite Schön and you are one handshake from Dewey.

Two companions keep the tradition social. Jane Addams treated settlement work at Hull House as situated inquiry, testing ideas about poverty and reform against a neighborhood rather than an armchair. George Herbert Mead, her Chicago colleague, made the self something built through interaction rather than an essence found by introspection. Pragmatism was never a solitary knower checking his hunches; knowledge is made with other people, in real settings.

So here is what to carry. Three words, ready when someone questions whether your professional knowing counts as evidence: warranted, fallible, tested. Then ask Dewey's question of yourself. Where have you already been running disciplined inquiry, starting from a felt difficulty and adjusting until something held, without ever calling it research? Name that, name what warranted it, and the defense writes itself.

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Adam DJ Brett, Ph.D.