Structural Coupling (Maturana)

Two systems are structurally coupled when the history of their recurrent interactions produces coordinated structural changes in both, making future interactions increasingly coherent. The tree on a hillside leans away from prevailing wind not because the wind sculpts it but because the tree's own growth processes respond to persistent mechanical perturbation by producing denser wood on the windward side. The wind perturbs; the tree's structure determines the response. The resulting form is the history of the coupling made visible. Applied to human-AI interaction, structural coupling dismantles the information-processing model that dominates popular understanding. Prompts are not information sent to the machine; they are perturbations that trigger Claude's statistical processing. Output is not information received by the user; it is perturbation that triggers the builder's own cognitive dynamics. Nothing is transferred. Both systems generate responses determined by their own structures.