Beyond the categorical museum: Why the DSM cannot name the neurodivergent mind

The removal of Asperger’s syndrome from the fifth edition of the Diagnostic and Statistical Manual of Mental Disorders was defended as a refinement: the replacement of an unreliable subtype by a dimensional construct grounded in empirical continuity. This paper argues that the move was not a refinement but a category error in the precise sense developed by Ryle and elaborated grammatically by Wittgenstein. The dimensional spectrum is a Cartesian instrument, a symptom space of discrete, additive criteria, bounded by thresholds, navigable by coordinates. The neurodivergent mind is not a Cartesian object. As a complex adaptive system operating in the vicinity of criticality, its identity is carried not by the values of isolated variables but by invariant dynamical structure: attractors, trajectories, phase-space signatures that persist under transformations which annihilate any pointwise description. To classify such an object by checklist is to apply a Euclidean ruler to a fractal coastline and report the measurement as fact. The result is not approximation. It is the wrong kind of answer to the question. The paper sits squarely in the territory of overlap between philosophy and psychiatry that defines the remit of this journal: it argues that an instrument’s adequacy to its object is the elementary methodological demand a nosology must satisfy, and that the 2013 revision failed that demand for reasons that are structural rather than contingent. I propose the recovery of the Asperger construct, not as a restored box with inclusion criteria, but as a recognizable emergent configuration of a cognitive system organized around a distinct attractor; and I develop the argument under the broader thesis of multigeometrism: the coexistence, within a single object, of ontologically real geometric regimes irreducible to one another and accessible only by instruments adequate to each.