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Concept
Teleonomy
Summary
Teleonomy is the quality of apparent purposefulness and of goal-directedness of structures and functions in living organisms brought about by natural processes like natural selection. The term derives from two Greek words, τέλος, from τελε-, ("end", "goal", "purpose") and νόμος nomos ("law"). Teleonomy is sometimes contrasted with teleology, where the latter is understood as a purposeful goal-directedness brought about through human or divine intention. Teleonomy is thought to derive from evolutionary history, adaptation for reproductive success, and/or the operation of a program. Teleonomy is related to programmatic or computational aspects of purpose.
Colin Pittendrigh, who coined the term in 1958, applied it to biological phenomena that appear to be end-directed, hoping to limit the much older term teleology to actions planned by an agent who can internally model alternative futures with intention, purpose and foresight:
Biologists for a while were prepared to say a turtle came ashore and laid its eggs. These verbal scruples were intended as a rejection of teleology but were based on the mistaken view that the efficiency of final causes is necessarily implied by the simple description of an end-directed mechanism. ... The biologists long-standing confusion would be removed if all end-directed systems were described by some other term, e.g., 'teleonomic', in order to emphasize that recognition and description of end-directedness does not carry a commitment to Aristotelian teleology as an efficient causal principle.
In 1965 Ernst Mayr cited Pittendrigh and criticized him for not making a "clear distinction between the two teleologies of Aristotle"; evolution involves Aristotle's material causes and formal causes rather than efficient causes. Mayr adopted Pittendrigh's term, but supplied his own definition:It would seem useful to rigidly restrict the term teleonomic to systems operating on the basis of a program of coded information. (p.
Official source
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