Here's some background:
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Normative pragmatism is the idea that discursive practice is implicitly, but essentially, and not just accidentally, a kind of normative practice. Discursive creatures live, and move, and have their being in a normative space. What one is doing in making a claim, performing the most fundamental kind of speech act, is committing oneself, exercising one’s authority to make oneself responsible. The commitments one undertakes in claiming (the beliefs one expresses in sincerely asserting something) are ones whose entitlement is always potentially at issue. Understanding someone’s utterance is knowing what they have committed themselves to by producing that performance, by saying what they said—as well as knowing what would entitle them to that commitment, and what is incompatible with it. Those commitments, entitlements, and incompatibilities are inferentially connected to one another. The space discursive creatures move about in by talking is a space of reasons, articulating what would be a reason for or against what. That is what connects normative pragmatism to semantic inferentialism.
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What is it one must do in order thereby to count as classifying something as being of some kind?
In the most general sense, one classifies something simply by responding to it differentially. Stimuli are grouped into kinds by the response-kinds they tend to elicit. In this sense, a chunk of iron classifies its environments into kinds by rusting in some of them and not others, increasing or decreasing its temperature, shattering or remaining intact. As is evident from this example, if classifying is just exercising a reliable differential responsive disposition, it is a ubiquitous feature of the inanimate world. For that very reason, classifying in this generic sense is not an attractive candidate for identification with conceptual, cognitive, or conscious activity. It doesn’t draw the right line between thinking and all sorts of thoughtless activities.
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Classification as the exercise of reliable differential responsive dispositions (however acquired) is not by itself yet a good candidate for conceptual classification, in the basic sense in which applying a concept to something is describing it. Why not? Suppose one were given a wand, and told that the light on the handle would go on if and only if what the wand was pointed at had the property of being grivey. One might then determine empirically that speakers are grivey, but microphones not, doorknobs are but windowshades are not, cats are and dogs are not, and so on. One is then in a position reliably, perhaps even infallibly, to apply the label ‘grivey’. Is one also in a position to describe things as grivey? Ought what one is doing to qualify as applying the concept grivey to things? Intuitively, the trouble is that one does not know what one has found out when one has found out that something is grivey, does not know what one is taking it to be when one takes it to be grivey, does not know what one is describing it as. The label is, we want to say, uninformative.
What more is required? Wilfrid Sellars gives this succinct, and I believe correct, answer:
It is only because the expressions in terms of which we describe objects, even such basic expressions as words for the perceptible characteristics of molar objects, locate these objects in a space of implications, that they describe at all, rather than merely label.
The reason ‘grivey’ is merely a label, that it classifies without informing, is that nothing follows from so classifying an object. If I discover that all the boxes in the attic I am charged with cleaning out have been labeled with red, yellow, or green stickers, all I learn is that those labeled with the same color share some property. To learn what they mean is to learn, for instance, that the owner put a red label on boxes to be discarded, green on those to be retained, and yellow on those that needed further sorting and decision. Once I know what follows from affixing one rather than another label, I can understand them not as mere labels, but as descriptions of the boxes to which they are applied. Description is classification with consequences, either immediately practical (“to be discarded/examined/kept”) or for further classifications.
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Here, then, is the first lesson that analytic philosophy ought to have taught cognitive science: there is a fundamental meta-conceptual distinction between classification in the sense of labeling and classification in the sense of describing, and it consists in the inferential consequences of the classification: its capacity to serve as a premise in inferences ( practical or
theoretical) to further conclusions. (Indeed, there are descriptive concepts that are purely theoretical—such as gene and quark—in the sense that in addition to their inferential consequences of application, they have only inferential circumstances of application.)
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https://sites.pitt.edu/~rbrandom/Texts/Inferentialism_Normative_Pragmatism_and.pdf
From this perspective, 'pain' gets its meaning from the inferences it's involved in:
she called into work, because it hurt too bad to stand up. In our culture, pain is understand (for instance) as an excuse or reason not to do something. Assertions are fundamental as inputs and outputs of arguments. Concepts justify or forbid inferential relationships between such assertions. At the very least this theory shines a new light on meaning and the space of reasons, it seems to me.
I started a Discussion on Brandom if you want more info.