Halassa writes in the context of a broader research program he calls algorithmic psychiatry, which argues that mental illness is best understood at the level of how the brain builds and updates models of the world. His recent essay describes the dissonance between Nash's trajectory and the clinical picture that dominates psychiatric training: patients who arrive at their first psychotic break already cognitively compromised, who decline further despite adequate treatment, and who never return to baseline. Did Nash really have schizophrenia? For Halassa, the question is less a diagnostic quibble than an invitation to look more carefully at what computational processes, and what developmental conditions, lie beneath that label.