Is it proven that the flow of emergence is from micro to macro?
ie. Can emergence go the other way? What’s the starting point of the process? Can a macro process cause micro processes? Or is it always the other way around? Does causality always run in one direction?
I would think the best you can do is something like fractal geometry, where self-similarity appears at all scales. In some sense, the rules are both micro and macroscopic. An example where this might have real-world implications is Palmer's Invariant Set Theory, which suggests that this fractal structure shapes both cosmological structures and what we see in quantum theory, eg. like violations of Bell's inequality,
On the other hand, you could argue that they’re not “real” and therefore not macro
As I'm writing this out and thinking about it, where would fictional objects fit on the micro <--> macro axis?
I don't know how much Hofstadter still invests in this idea, but at the time of GEB, he seemed pretty convinced it is/was a central part of how complex systems like minds/brains function.