This paper presents the identification of a structural level necessary for the organization of articulated thought. The analysis demonstrates that articulated thought depends structurally on the operation of distinctions. Without distinctions, elements cannot be organized into relations of meaning, making articulated thought impossible. From this analysis emerges the recognition of a structural level at which distinctions operate as the organizing condition of articulated thought. This structural level constitutes the necessary condition that allows thought to articulate relations, concepts, interpretations and theoretical formulations. The formulation does not describe the nature of the world, does not establish ontological propositions and does not present interpretations about reality. Its scope is limited to the structural condition that makes articulated thought possible.