This paper offers a structural diagnosis of the concept of truth after deflation. Rather than revisiting the familiar inflationary–deflationary debate, it takes deflationary commitments as given and asks what remains once metaphysical grounding, explanatory depth, and framework-independent adjudicative authority are relinquished. The central claim is that truth becomes exhausted. Once deflationary constraints are honoured, attempts to stabilise Truth exhibit a recurring two-horn dilemma: Invariance through reduction: Truth can be stabilised by disquotation, stipulation, or procedural norms, but only by collapsing into an administratively thin device incapable of adjudicating between rival frameworks. Substantiveness through contestability: Truth can retain adjudicative ambition only by appealing to criteria that are themselves framework-dependent, circular, or metaphysically inflationary, thereby reintroducing structural contestability. The paper argues that prominent post-deflationary strategies—alethic pluralism, normative minimalism, pragmatic deflationism, and quietism—do not escape this dilemma but merely instantiate one of its horns. To demonstrate that this instability is structural rather than domain-specific, the argument is tested across three worked cases: moral truth, scientific truth, and historical truth. In each domain, truth-talk functions effectively as a grammatical and institutional device for endorsement, generalisation, and dispute management, while failing to deliver the framework-transcendent adjudicative authority often demanded of it. The paper concludes that the persistence of truth-theoretic debate is not evidence of unresolved metaphysical depth, but of a mismatch between the procedural role truth actually plays and the substantive role philosophers continue to project onto it. Truth remains indispensable in practice, yet philosophically incapable of bearing the explanatory and adjudicative burdens traditionally assigned to it. Optional reference is made to the Language Insufficiency Hypothesis as an explanatory lens for why attempts to elaborate Truth beyond its procedural role reliably increase interpretive variance rather than convergence, though the core argument does not depend on its acceptance.
Bry Willis (2026) studied this question.