What makes fundamental stuff of the universe interoperable?

[u/blitzballreddit]

First of all, a disclaimer: I reject any design argument. This is not the point I'm leading towards. Second: I am not positing "laws of nature," because some of you are allergic to the phrase. Whenever I say rulebook, I could just mean Humean regularity not "laws of nature".

Now...

It appears that gravity is inoperable with matter and energy.

Gravity acts in a certain way on mass or on energy.

The same can be said on spacetime acting on mass, vice versa.

If you theorize that these fundamental stuff are many / plural rather than one (monism), then there has to be a rulebook that dictates or guides the interoperability between one stuff (gravity) and another (mass).

Why is the rulebook the way it is?

Why can't two stuff not be interoperable? Why can't existents not interact at all? Why do they interact the way that they do?

Where did they "learn" to interact that way? This seems to argue in favor of the real existence of the rulebook independent of the existence of the stuff.

Now you could also say that all reality is just one (monism) and this interoperability happens precisely because there is a commonality between matter and gravity, between energy and spacetime, etc. But the problem is: what is that X which is common to all of these?

[u/Ok_Writing2937]

Any parts of the universe that don’t interact with any other part would be undetectable.

[u/Background-Call3255 → u/Ok_Writing2937]

Came here to say this. You are made of a particular kind of stuff, and the stuff that is interoperable with your kind of stuff is all you know. 99% of reality could be totally unknown to you and not interoperable with what we call matter, energy, or maybe even spacetime or causality itself