2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/149734A simple model of self-organised learning with no classical (Hebbian) reinforcement is presented. Synaptic connections involved in mistakes are depressed. The model operates at a highly adaptive, probably critical, state reached by extremal dynamics similar to that of recent evolution models. Thus, one might think of the mechanism as synaptic Darwinism.12 pages, Latex2eAdaptation and Self-Organizing SystemsCondensed MatterQuantitative Biologytext