<p>Epistemology has long recognized that the convergence of independent evidence strengthens belief. What it has consistently failed to provide is a formal architecture for verifying genuine independence, a minimum structural threshold for that convergence to constitute the strongest available non-deductive warrant, and a positive signal that inquiry has reached a principled stopping point. This paper proposes Trisduction as that architecture.</p> <p>Drawing on the geometry of three mutually orthogonal warrant-vectors as its organizing structure, Trisduction argues that propositions supported by three strictly independent lines of inquiry — verified through the Deletion Test and the Linguistic Isolation Test — achieve Geometric Orthogonal Lock (GOL [⟀]): a unique epistemic coordinate from which all competing alternatives have been structurally exhausted. This certification is categorically stronger than Bayesian high posterior probability, methodological triangulation, Wilsonian consilience, or falsificationist corroboration, and it is achieved through a 12-Gate verification cascade that any practitioner can apply and any adversarial critic can challenge.</p> <p>The paper positions Trisduction within the intellectual tradition it extends — from Aristotle's deduction through Peirce's abduction, Popper's falsificationism, Campbell-Fiske convergent validity, and Wilson's consilience — with full directness about what each framework achieves and where each reaches its structural ceiling. It introduces a complete operational glossary that eliminates equivocation risk, documents the three orthogonal warrant-vectors (V_F, V_E, V_P), presents the 12-Gate Cascade in full technical specification, supplies cross-domain case studies demonstrating the architecture under adversarial conditions, and closes with a comprehensive literature review mapping the precise relationship between Trisduction and its intellectual predecessors.</p> <p>The central result: when a proposition navigates all twelve gates without a single classification downgrade, it has exhausted every recognized degree of freedom in the epistemic possibility space. The geometry is sealed. The Convergence Point is occupied. The lock holds.</p>