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26. Natural Theory / A. Speculations on Nature / 3. Natural Function

[what components of nature are meant to do]

8 ideas
A thing's function is what it alone can do, or what it does better than other things [Plato]
Each thing's function is its end [Aristotle]
Each thing that has a function is for the sake of that function [Aristotle]
A thing's active function is its end [Aristotle]
Is ceasing-to-be unnatural if it happens by force, and natural otherwise? [Aristotle]
The function of a heart depends on what we want it to do [Searle]
Things are thought to have a function, even when they can't perform them [Sainsbury]
Rather than dispositions, functions may be the element that brought a thing into existence [Leuridan]