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“Most instincts are allied to specialized organs, it is true, but it is nonetheless true that perception and acquired behavior, including the higher types of operative intelligence, do, in a more supple way, manifest certain functional possibilities or "reaction norms" of the anatomical and physiological structure of the species. In a word, the general coordinations of action upon which the building up of most basic types of knowledge is conditional, presuppose not only nervous coordinations but coordinations of a much more deep-seated kind, those which are, in fact, interactions dominating the entire morphogenesis.”
― Jean Piaget, Biology and Knowledge: An Essay on the Relations between Organic Regulations and Cognitive Processes

“Cognitive processes seem, then, to be at one and the same time the outcome of organic autoregulation, reflecting its essential mechanisms, and the most highly differentiated organs of this regulation at the core of interactions with the environment, so much so that, in the case of man, these processes are being extended to the universe itself.”
― Jean Piaget, Biology and Knowledge: An Essay on the Relations between Organic Regulations and Cognitive Processes