“It is essential to realize at this point that the formalism to be developed, although we cast it initially primarily in the framework of natural systems, is in fact applicable to any situation in which a class of objects is associated with real numbers, or in fact classified or indexed by any set whatever. It is thus applicable to any situation in which classification, or recognition, or discrimination is involved; indeed, one of the aims of our formalism is to point up the essential equivalence of the measurement problem in physics with all types of recognition or classification mechanisms based on observable properties of the objects being recognized or classified.”

—  Robert Rosen

Source: Fundamentals of measurement and representation of natural systems. (1978), Ch. 2. The Basic Formalism; Quoted in: Mikulecky, Donald C. " Robert Rosen: the well‐posed question and its answer‐why are organisms different from machines? http://www.people.vcu.edu/~mikuleck/PPRISS3.html." Systems Research and Behavioral Science 17.5 (2000): 419-432.

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Robert Rosen8
American theoretical biologist 1934–1998

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