Aristotle compared the acquisition of knowledge to wax taking on the shape of a seal. I prefer to think of it (and must have gotten this from somewhere--don't know where) to a hand grasping something, with the interior of the hand taking on the shape of that which has been grasped (or perhaps I should say "the surface of the hand" in order to avoid the impression that I am imputing a kind of interiority--I am not sure that I want to go there). This metaphor captures how knowledge, and cognition in general, always involves active and passive aspects,with language being the way we reach out at things that we can't actually touch.
How about defining it as an instance of functional complexity? And treating the list of properties as following necessarily from this definition? Okay, this is very diamond-in-the-rough (or perhaps zirconium...) but here goes my thoughts on the matter: (Complexity) Many diverse parts (functional) acting for the sake of the whole I think I need to add something like "not as the instrument of another" or something like that. Given that they act together as one whole and given entropy, etc., the organism will need to posses more order than its surroundings (homeostasis). It will therefore need to take in energy (nutrition), which it will use to sustain its readiness to interact with its environment so as to preserve its own being (homeostasis again?), but which will eventually break down (death), so that in order for that life form to continue it will need to duplicate itself (reproduction), which, upon occurring, will involve both development (growth) to maturity and...
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