"The Paragenealogical Method in the Anthropology of Rationalities Since the Cold War, the concept of rationality has become increasingly associated with certain formal models of logic and computation. This talk offers a critical examination of computational rationality, challenging the supposed universality of the formal models that have come to define it. Instead of tracing the emergence of computational rationality through a conventional Foucauldian genealogy, I propose a “paragenealogical” method for doing so. Rather than following the central actors who appear to have originated the currently predominant models of rationality, a paragenealogy focuses on peripheral actors who have imagined and developed unorthodox models that may have been ignored, suppressed, or marginalized. To illustrate, I briefly discuss a few historical and ethnographic case studies: nonclassical systems of logic developed by Brazilian mathematicians, nonbinary models of computation by Indian scientists, socialist frameworks of informatics by Cuban librarians and scientists, and efforts to formalize poetic language and translation by Czech linguists and engineers."