When Syntax Is Asked to Bear Too Much: The Frege–Geach Problem and the Limits of Linguistic Invariance

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Auteur principal: Willis, Bry
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Langue:anglais
Publié: Zenodo 2026
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_version_ 1866901859796516864
author Willis, Bry
author_facet Willis, Bry
contents <p>The Frege–Geach problem is often taken to demonstrate a fundamental incompatibility between expressivist accounts of moral language and logical embedding. According to the standard objection, if moral judgments do not express truth-apt propositions, then they cannot figure coherently in conditionals, negations, or other embedded contexts. Since ordinary moral discourse routinely embeds, expressivism appears unable to account for the inferential roles moral statements play.</p> <p>This paper offers a different diagnosis. Rather than locating the difficulty in moral language, it argues that the persistence of the Frege–Geach problem reflects misplaced expectations about what natural language syntax can support. Formal logic was developed precisely to supplement the limitations of ordinary language by enforcing semantic invariance under transformation. Treating this engineered invariance as a universal criterion of semantic adequacy reverses that historical lesson.</p> <p>Drawing on the Language Insufficiency Hypothesis, the paper locates moral predicates within a broader class of <strong>recruitable expressions</strong>: expressions whose full evaluative load is attenuated under embedding whilst a thinner <strong>structural-inferential skeleton</strong> remains available for reasoning. The standard of <strong>practical inferential adequacy</strong> replaces the demand for semantic identity: what ordinary reasoning requires is not unrestricted invariance but inferential sufficiency.</p> <p>This pattern is not peculiar to moral language. Thick evaluative terms, epistemic contestables, and institutional vocabulary exhibit analogous redistribution under embedding. Frege–Geach is therefore dissolved as a demand for unrestricted semantic invariance and resolved insofar as the behaviour it identifies is explained, predicted, and shown to be general.</p> <p><strong>Revision note for v1.1:</strong> This version makes limited clarificatory revisions, including moderating some terminology, sharpening the account of structural-inferential role, and narrowing the scope of certain claims. No substantive expansion of the paper’s central argument has been made.</p> <p><strong>Revision note for v1.2:</strong> This version adds a new Section 4, “A Positive Account of Embedded Moral Predicates”, introducing the category of recruitable expressions, the standard of practical inferential adequacy, and non-moral parallels demonstrating the generality of the redistribution pattern. The conclusion has been revised accordingly, and section numbering has been updated.</p>
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spellingShingle When Syntax Is Asked to Bear Too Much: The Frege–Geach Problem and the Limits of Linguistic Invariance
Willis, Bry
Frege–Geach problem
expressivism
moral language
compositionality
Philosophy of language
metaethics
Language Insufficiency Hypothesis
Philosophy
Ethics
semantic invariance
logical embedding
inferential role semantics
contextualism
semantic fracture
functional distribution of meaning
Contestables and Fluids
limits of compositionality
analytic philosophy
normativity
meaning and use
<p>The Frege–Geach problem is often taken to demonstrate a fundamental incompatibility between expressivist accounts of moral language and logical embedding. According to the standard objection, if moral judgments do not express truth-apt propositions, then they cannot figure coherently in conditionals, negations, or other embedded contexts. Since ordinary moral discourse routinely embeds, expressivism appears unable to account for the inferential roles moral statements play.</p> <p>This paper offers a different diagnosis. Rather than locating the difficulty in moral language, it argues that the persistence of the Frege–Geach problem reflects misplaced expectations about what natural language syntax can support. Formal logic was developed precisely to supplement the limitations of ordinary language by enforcing semantic invariance under transformation. Treating this engineered invariance as a universal criterion of semantic adequacy reverses that historical lesson.</p> <p>Drawing on the Language Insufficiency Hypothesis, the paper locates moral predicates within a broader class of <strong>recruitable expressions</strong>: expressions whose full evaluative load is attenuated under embedding whilst a thinner <strong>structural-inferential skeleton</strong> remains available for reasoning. The standard of <strong>practical inferential adequacy</strong> replaces the demand for semantic identity: what ordinary reasoning requires is not unrestricted invariance but inferential sufficiency.</p> <p>This pattern is not peculiar to moral language. Thick evaluative terms, epistemic contestables, and institutional vocabulary exhibit analogous redistribution under embedding. Frege–Geach is therefore dissolved as a demand for unrestricted semantic invariance and resolved insofar as the behaviour it identifies is explained, predicted, and shown to be general.</p> <p><strong>Revision note for v1.1:</strong> This version makes limited clarificatory revisions, including moderating some terminology, sharpening the account of structural-inferential role, and narrowing the scope of certain claims. No substantive expansion of the paper’s central argument has been made.</p> <p><strong>Revision note for v1.2:</strong> This version adds a new Section 4, “A Positive Account of Embedded Moral Predicates”, introducing the category of recruitable expressions, the standard of practical inferential adequacy, and non-moral parallels demonstrating the generality of the redistribution pattern. The conclusion has been revised accordingly, and section numbering has been updated.</p>
title When Syntax Is Asked to Bear Too Much: The Frege–Geach Problem and the Limits of Linguistic Invariance
topic Frege–Geach problem
expressivism
moral language
compositionality
Philosophy of language
metaethics
Language Insufficiency Hypothesis
Philosophy
Ethics
semantic invariance
logical embedding
inferential role semantics
contextualism
semantic fracture
functional distribution of meaning
Contestables and Fluids
limits of compositionality
analytic philosophy
normativity
meaning and use
url https://doi.org/10.5281/zenodo.19412313