Is indirect realism self undermining? If you accept that the Earth isn't flat, then you presumably accept that a flat Earth cannot be the physical cause of a Flat-Earther's beliefs. In which case, how and in what sense can he be said to be referring to the Earth? — sime
Here's an alternative view of meaning.
The master-idea of semantic inferentialism is to look instead to inference, rather than representation, as the basic concept of semantics. What makes something meaningful or contentful in the sense that matters for sapience (rather than the mere sentience we share with many nonlinguistic animals) is the role that it plays in reasoning. The primary vehicle of meaning in this sense is declarative sentences. Those are symbols that can be used to assert, state, or claim that things are thus-and-so. The kind of content they express, “propositional” content, in the philosopher’s jargon, is what can both serve as and stand in need of reasons—that is what can play the role both of premise and of conclusion in inferences.
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Pragmatism in general is the claim that pragmatics is methodologically, conceptually, and explanatorily prior to semantics—that one should understand the meaning or content expressed by linguistic locutions in terms of their use. The later Wittgenstein, who counseled “Don’t look to the meaning, look to the use,” is a pragmatist in this sense (though he didn’t use that term). 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.
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.