Llull’s Ars brevis condenses reasoning into a finite alphabet of principles, relational figures and combinatorial procedures. Its importance lies less in any retrospective claim that it anticipates computation than in the architectural character of its thought: knowledge is externalised into an arrangement whose elements can be systematically recombined. The figures do not merely illustrate conclusions already reached; they establish a formal environment in which propositions and questions can be generated through relation. A limited vocabulary therefore produces a potentially expansive field without dissolving the identity of its parts. The operative contribution is combination under constraint. Thought becomes dependent on positions, pairings and rotations rather than on a single linear exposition. The wider bridge is to diagrammatic reasoning, formal languages and generative systems: a small set of defined elements can acquire intellectual productivity when the rules governing their encounter are explicit. Llull provides an early model of knowledge as something that can be organised so that relations themselves perform work.