The strongest nexus across Shannon, McCulloch and Pitts, Bateson, von Foerster and Luhmann is the displacement of knowledge from substance to relation: intelligence no longer appears as a hidden essence, interior faculty or sovereign subject, but as a recursive organization of distinctions, signals, thresholds, feedbacks and communications. McCulloch and Pitts formalize nervous activity as a logical calculus, showing that neural events can be treated as propositional operations rather than mystical contents; Shannon strips communication of semantic privilege in order to define information as selection under uncertainty, transmitted through channel, code and noise; Bateson radicalizes this shift by making “difference” the minimal unit of mind, extending cognition into ecology, pattern, play, pathology and civilization; von Foerster turns cybernetics toward the observer, insisting that cognition is not passive registration but active construction; Luhmann then transfers the entire problem into social theory, where society is not made of individuals but of communications recursively reproducing communications. Together, these works do not simply found cybernetics, information theory or systems theory. They produce a new epistemic scene in which thought is infrastructural: it operates through circuits, delays, distinctions, redundancies, closures, environments and second-order observations. The mind is no longer located in the head alone, nor meaning in the message alone, nor society in the human actor alone. Each text attacks a different version of naïve realism: the neuron is not an idea but can behave logically; the message is not its meaning but a selected possibility; the organism is not outside its ecology but patterned by it; the observer is not outside observation but implicated in it; the social system is not a container of subjects but an autopoietic field of communicative difference. The common concept is therefore recursive epistemology: knowledge as the patterned production of distinctions inside systems that can never fully step outside their own operations.