1.) Define nature as what we know by experimentation. Any operational or verificationist definition does so.
2.) Experimentation is how things act by themselves under controlled conditions.
3.) So nature is what we know of how things act by themselves under controlled conditions.
4.) Leaving aside freely chosen actions, any action of a condition we control is fundamentally an accidental form while anything acting by itself is fundamentally a substantial form.
You set up a lab experiment to prove the ideal gas law by putting a thermometer on the bottom of a piston, cranking up the pressure, and showing the temperature go up. Temperature is defined operationally as what some fluid does in a thermometer and pressure as what happens when the piston compresses. But thermometers and pistons are accidental forms. If we take the experiment as an action then the only substance that acts simply speaking, as opposed to responding to an already initiated action, is you.
5.) Experimenters abstract from their causal role or assume that the action that occurs in nature arises from some agent relevantly similar to themselves.
It’s here that the ontology of nature-as-experimentally-verifiable becomes interesting. Let’s move on to that.
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On the one hand, abstracting from our causal role does not effect the various unities we discover in causal laws. So the ideal gas law is ultimately taken to show a formal unity between pressure, volume and temperature through the kinetic theory of heat. But this sort of unity abstracts from what something happens in nature – the mere unity of P, V and T can’t explain why in this particular instance heat went up, since the unity would just as easily explain why it might have gone down. So why does anything happen?
Some substance relevantly similar to an experimenter is acting. What would a relevantly similar action require? Either (a) it is pushing up agains the action of another substance incidentally or (b) it has some natural intentionality seeking to subordinate another substance to its own goals. If (a) the activity is an incidental side-effect of a substance that was tending to something else, which leaves us with essentially the same sort of agency as (b), where some natural agent is intending some goal or another.
If this is right, what we call “natural laws” are the conditions under which natural substances work to achieve whatever goals they strive for. The laws give accounts of a marketplace where agents interact and exchange. Certain quantities are conserved in the same way that exchange rates or common instruments of value are conserved.
Marketplaces abstract from particular goals. If you want shoes and I want pie the market where we meet can’t be shoemaking or pie making but needs to serve as a common interface for both. In this sense – of neither making my pies or your shoes – markets have no goals. This is common to all interactions, which exist to facilitate action and articulate its costs, and so to be devoid of the goals of those whom it facilitates.
So it is not just the algorithmic or mathematical character of laws that make them non-teleological but their interactionist character. But this interaction is non-teleological only in the way all interactions are such, sc. that the interaction is taking place only in virtue of rules that are impartial to the goals of the instructing substances. The forces of nature are thus blind in precisely the same way that justice is blind.
This leaves us with the same phenomena of “blind forces” we’ve always had which consists in an indifference to outcomes, but the blindness is not due to being brutish but in having an ideal of intelligence. Like any market system there are strokes of bad luck and catastrophe typical of complex interactions of any system with finite resources of power and intelligence.
If nature is this interactional marketplace for natural substances, then what we call “natural substances” are a different order of existence than what we call “nature”. We see the natural substance only so far as it is living in the marketplace and not in its proper existence as one using the marketplace to attain various goals.
The natural substance this becomes supernatural, and all action as such is supernatural, and asking how this supernatural being interacts with nature is the same sort of question as asking how consumers interact with a market. In one sense this the question is confused, since consumers don’t interact with the market any more than money changers interact with exchange rates. No one acts with anything that merely facilitates his activity with another.
It would be better to say, however, that when nature is defined operationally or through natural laws then we are abstracting from nature as substance acting for itself. In actual fact the “interaction problem” arises because we have imagined interactive forces as substantial or acting of themselves when in fact they abstract from precisely what acts from itself. Free will and intelligence are just one way in which nature acts by itself by having a form of its own.