Indeterminacy of Translation & Meaning Holism

The Indeterminacy Thesis & Its Implications

Willard Van Orman Quine by Licentia Poetica

Indeterminacy of translation of theoretical sentences

Willard Van Orman Quine’s thesis of the indeterminacy of translation, most fully articulated in chapters one and two of Word and Object (1960), asserts that even the best possible translation manuals for an unknown language can diverge radically while remaining fully compatible with all observable speech behavior. Quine distinguishes two levels of indeterminacy. At the level of observation sentences, stimulus meanings — patterns of sensory stimulations prompting assent or dissent — fix empirical content with relative determinacy. For theoretical sentences, however, no such fixation occurs. Because evidence confronts the linguist only in the form of whole theories, multiple incompatible ways of assigning meanings to theoretical sentences can fit the same totality of behavioral dispositions. The linguist’s analytical hypotheses about how to segment the foreign language into words and predicates remain underdetermined; different segmentations and different assignments of reference to terms can yield equally adequate manuals. Quine emphasizes that this indeterminacy is not merely epistemic uncertainty on the part of the translator but an ontological fact: there is simply no deeper fact of the matter that could decide between rival manuals. The indeterminacy of theoretical sentences thus flows directly from Quine’s semantic holism and the underdetermination of theory by evidence. Any attempt to pin down a unique translation for a sentence deep in the theoretical interior of the web of belief will fail because revisions can always be redistributed across the entire system to preserve observational fit. This result undermines any notion of determinate propositional content for theoretical claims and forces philosophy of language to operate within the constraints of observable behavior alone.

Inscrutability of reference & ontological relativity

Quine’s gavagai example dramatizes the more radical inscrutability of reference that accompanies indeterminacy of translation. When a native assents to “Gavagai!” in the presence of a rabbit, the linguist’s stimulus data are equally satisfied by translating the term as “rabbit,” “undetached rabbit part,” “rabbit stage,” or even “rabbit-fusion.” No further behavioral evidence can adjudicate among these alternatives because they are extensionally equivalent in all observable contexts. Reference is therefore inscrutable: there is no behavioral fact that fixes what objects the term denotes. This inscrutability generalizes to ontological relativity, the doctrine Quine develops fully in the 1968 essay “Ontological Relativity.” Once we accept that translation is indeterminate, we must acknowledge that ontology — what exists — is relative to a chosen background theory and its regimentation in first-order logic. Proxy functions — systematic one-to-one mappings that replace every entity in the domain with another while preserving all structural relations — can reinterpret an entire ontology without altering the truth values of any sentence. One manual may commit us to rabbits as whole objects; another, empirically equivalent manual may commit us only to their undetached parts. Because no evidence distinguishes the manuals, questions of existence make sense only relative to an interpretive scheme. The slogan “to be is to be the value of a bound variable” receives its translational grounding here: ontological commitment is always relative to the manual we adopt. Ontological relativity thus completes the collapse of absolute reference and absolute ontology, replacing both with pragmatic choices among empirically equivalent schemes.

Behaviorist criterion of meaning: stimulus meaning

Quine replaces traditional notions of meaning with the strictly behaviorist concept of stimulus meaning. The stimulus meaning of a sentence for a speaker is the ordered pair consisting of the class of all sensory stimulations that would prompt assent and the class that would prompt dissent. Observation sentences receive their full empirical content from these stimulus meanings, serving as the entering wedge for both language learning and radical translation. By defining meaning in terms of publicly observable dispositions to verbal behavior rather than private mental entities or abstract propositions, Quine ensures that semantics remains within the domain of empirical psychology. Standing sentences and theoretical sentences inherit their meaning holistically through their connections to observation sentences, but their stimulus meanings are not fixed independently. The behaviorist criterion eliminates any appeal to intensions or meanings as intervening entities between stimulus and response. Synonymy is redefined as stimulus synonymy — identical stimulus meanings across speakers — yet even this notion becomes indeterminate once we move beyond observation sentences. Stimulus meaning thus provides the austere foundation for a scientific semantics that treats language as a social art acquired through conditioning and reinforcement, fully compatible with Quine’s physicalism and his rejection of Cartesian mentalism.

Rejection of synonymy & analyticity

The indeterminacy thesis extends and radicalizes Quine’s earlier rejection of the analytic–synthetic distinction in “Two Dogmas of Empiricism.” If rival translation manuals can assign different meanings to the same sentences while fitting all behavioral data, then no objective relation of synonymy exists that could ground analyticity. Two sentences are not objectively synonymous simply because they are interchangeable in all contexts; any such interchangeability is relative to a chosen manual of translation. The very notion of a sentence being true by virtue of meaning alone collapses because meanings themselves are indeterminate. Quine’s behaviorist criterion reinforces this rejection: stimulus synonymy captures only a narrow class of observation sentences and fails to support the broader analyticities required by logical positivism or ordinary-language philosophy. Even sentences that appear obviously analytic, such as logical truths, receive no special immunity; they occupy central positions in the web of belief but remain revisable in principle. The indeterminacy of translation therefore dissolves synonymy as an objective relation and with it the last refuge of analyticity, completing the shift from a semantics of meanings to a semantics of stimulus-response dispositions and pragmatic adjustments within the web of belief.

Relation to Quine’s critique of intensional objects

Indeterminacy of translation and meaning holism are inseparable from Quine’s longstanding critique of intensional objects — propositions, properties, meanings, and modal entities. Because translation is indeterminate, there can be no determinate proposition that a sentence expresses; different manuals will pair the same sentence with different propositional contents. Propositions thus become “creatures of darkness” that resist regimentation into extensional first-order logic. The inscrutability of reference similarly undermines properties and attributes as fixed entities. Quine’s extensionalism demands that semantics avoid opaque contexts and non-extensional notions; indeterminacy shows that any appeal to intensions would require facts of the matter that simply do not exist. Modal logic fares no better: quantified modal logic generates essentialist commitments that presuppose determinate meanings and references Quine has shown to be illusory. By rejecting intensional objects, Quine ensures that his philosophy of language remains within the bounds of scientific respectability, countenancing only physical objects and the sets required by mathematics. The indeterminacy thesis thus serves as both consequence and reinforcement of his physicalist and extensionalist ontology.

Influence on Davidson’s radical interpretation & Putnam’s model-theoretic argument

Quine’s ideas profoundly shaped subsequent philosophy of language. Donald Davidson, Quine’s student and colleague, transformed radical translation into radical interpretation, retaining the behavioral starting point and the principle of charity but arguing that constraints of rationality and coherence can reduce indeterminacy to manageable levels. Davidson’s principle of charity — maximizing truth and rationality in interpretation — functions as a normative supplement to Quine’s purely descriptive stimulus meanings, allowing him to construct a theory of meaning without reifying propositions. Hilary Putnam drew on ontological relativity and the model-theoretic argument in “Models and Reality” (1980) to attack metaphysical realism. Using techniques akin to Quine’s proxy functions, Putnam showed that an ideal theory can be satisfied by multiple models, undermining the idea of a unique intended reference or correspondence between language and reality. Both Davidson and Putnam thus developed Quine’s indeterminacy in divergent directions: Davidson toward a truth-conditional semantics grounded in interpretation, Putnam toward internal realism and the rejection of a ready-made world. Their engagements demonstrate the fertility of Quine’s thesis while revealing its capacity to generate rival programs within analytic philosophy.

Contemporary debates: meaning skepticism, semantic externalism

The indeterminacy thesis continues to fuel contemporary debates in philosophy of language and mind. Meaning skepticism, most famously associated with Saul Kripke’s interpretation of Wittgenstein’s rule-following considerations, finds a parallel in Quine’s claim that no behavioral facts fix meaning; both challenge the idea of determinate semantic facts. Semantic externalism, developed by Putnam in the twin-earth thought experiments and by Tyler Burge, owes an indirect debt to Quine’s emphasis on observable behavior and environmental causation, yet externalists often reject full indeterminacy by appealing to causal-historical chains or social division of linguistic labor to fix reference. In cognitive science and artificial intelligence, Quine’s holism and indeterminacy inform discussions of machine translation, large language models, and the limits of computational semantics. Philosophers of science continue to debate whether underdetermination of theory by evidence entails indeterminacy of translation, while naturalized epistemologists and cognitive scientists explore how stimulus meanings and holistic belief revision operate in actual human psychology. Even critics who defend determinate meanings — such as those invoking innate structures or teleosemantics — must define their positions against Quine’s challenge. More than sixty years after Word and Object, the indeterminacy thesis and its holistic companion remain central to any serious attempt to understand meaning, reference, and the relation between language and the world.

Quine’s indeterminacy of translation and meaning holism constitute one of the most radical and enduring contributions to twentieth- and twenty-first-century philosophy of language. By demonstrating that meaning is not a fixed, private, or intensional entity but a public, behavioral, and holistic affair, Quine dismantled traditional semantic foundations and opened the way for naturalistic, scientific approaches to language and mind. The thesis not only completed the naturalization of epistemology and ontology but also set the agenda for subsequent debates that continue to define analytic philosophy. Its implications reach far beyond technical semantics into metaphysics, philosophy of science, and cognitive science, ensuring that Quine’s work remains indispensable for anyone seeking a coherent, empirically grounded account of how language relates to reality.

Further Readings

• Word and Object (1960) — chapters 1–2
• “Ontological Relativity” (1968) in Ontological Relativity and Other Essays
• Indeterminacy of Translation by Robert Sinclair (in The Oxford Handbook of Philosophy of Language)
• Quine on Meaning & Translation by Gary Ebbs (in A Companion to Quine)
• Meaning Holism by Jerry Fodor & Ernest LePore (1992) — critical response
• Quine on Meaning: The Indeterminacy of Translation by Eve Gaudet (2006)
• The Themes of Quine’s Philosophy: Meaning, Reference and Knowledge by Edward Becker (2012)
• Quine by Peter Hylton (2007)
• Working from Within: The Nature of Quine’s Naturalism by Sander Verhaegh (2018)
• A Companion to W.V.O. Quine edited by Gilbert Harman and Ernie Lepore (2014)
• “On the Reasons for the Indeterminacy of Translation” by W.V. Quine (1970, Journal of Philosophy)
• Quine and Davidson on Language, Thought and Reality by Hans-Johann Glock (2003)
• Perspectives on Quine edited by Robert B. Barrett and Roger F. Gibson Jr. (1990)
• From Stimulus to Science by W.V. Quine (1995)
• Ontological Relativity and Other Essays by W.V. Quine (1969)