Correct me if I am wrong, but does the very concept of 'emergence' not imply a lower level of (more) fundamental laws? Emergent stuff emerge from fundamental stuff, right?
Unless you are arguing that it is emergence all the way down, which seems incompatible with the concept of emergence, I do not see the relevance to a discussion about fundamental laws. — Querius
So if more particular laws emerge from more general laws, what's illogical about extrapolating from that observable fact? If what we see is emergence, then why shouldn't we think that is all there is, rather than having to leap to belief in something mysterious, transcendent or supernatural?
All that is required then is a proper understanding of emergence itself. And your claim - the usual reductionist one which makes emergence some kind of elaborate linguistic illusion - is not a proper model of emergence.
Emergence - as it is understood by hierarchy theorists, Peirceans, and others who take it seriously - is a holistic or cybernetic deal. The whole shapes the parts that constructs the whole. So what is "fundamental" is hierarchical development itself. Existence begins not with nothing but instead an "everythingness" - a "state" of unbounded potential. And then limitations develop to produce definite somethingness.
As I say, this is simply a fact when it comes to accounting for the "higher level laws". It is what we mean by them being emergent. Complexity and particularity arises as the general (some generalised set of freedoms) becomes more constrained in specific ways. History locks in its own future by removing certain possibilities as things that could actually happen. And the future is then woven from what was thus left open as a possibility.
So we know this holistic understanding of emergence is right just from looking at the world and listening to how physics actually describes it. For that reason, it is more logical to expect that emergence of this kind can explain it all ... or at least get as near as we are ever going to get to answering that ultimate question of "why anything?".
But instead you have fallen into the usual trap of expecting reality to bottom-out in some fundamental atomistic stuff. And in the 1880s, most physicists would have agreed with you, feeling that the great success of classical mechanics and atomistic metaphysics had basically put an end to physics - leaving it "an exhausted mine". Yet then guess what happened next.
Of course it is just as bad to make the other monistic claim - that everything is instead top-down. That just winds up in mysticism.
If we want to talk about real emergence, it is irreducibly triadic (because everything must emerge - the forms, the materials, and the dynamical balance of these two which is then the substantial actuality).
So you are not even dealing with the actual argument of a proper holist yet. You are just thinking in terms of the reductionism that wants to neuter emergence by treating it as "mere appearance". Or in the slightly more sophisticated defensive position of "supervenience", one shrugs one shoulders and says even if all this top-down stuff is true, it can't change anything important down here at the level of concrete atomistic particulars.
But unfortunately for supervenience, there are no concrete particulars except to the degree that top-down constraints have shaped them.
One can imagine taking an instantaneous snapshot of some material system and transporting its information to make a perfect clone ... that would then roll on as if nothing had happened. Beam me up Scotty! Dissolve my atoms in one place, produce a replica in another. Hey presto.
But science fiction is science fiction. Real science knows it has a fundamental observer problem. The acts of measurement needed to animate the mathematical equations are not reducible to the formalisms of theories. And this is going to catch you out any time you start talking about the big questions of existence.
So supervenient emergence sounds good - if you don't understand the basic problem of observerless physics.
It is something that does catch out everyone. Tom is another example in that he repeats the same error at the level of the information. He believes in observerless computation. And so he has no problem with a scifi story of human minds being downloaded. Or existence itself being a grand computation (finitude being something that can be taken formally for granted and not instead a fundamental problem in being an informal issue of deciding when an act of measurement is "sufficient to purpose").
Anyway, the point is that to dismiss a metaphysics of emergence, one first has to learn quite a lot about what that position entails. Reductionists have conjured up their own strawman versions which they can erect at the boundaries of their domain and say "see we understand, and it doesn't change anything". To people who actually study emergence, you can see why the constant waving of the limp effigy of supervenience or epiphenomenalism is rather annoying.
:)