> It seems contradictory to admit they could invent math and logic, but then reject that they could go one step further and rig that understanding of math into and understanding of physics. I'll admit without some corpus of data to understand the motivation for constructing physics is tenuous. But the question was about the principle of if they could and if you're granting me math I don't see any obstacle left.

The problem with math is that math can describe any possible universe, and there is no way to choose until you confront it with the real world. Nothing in math prevents the world from having 1 dimension of time and 1 of space, for example. Nothing in math prevents the electron from being much larger than the proton, or the existence of solitary quarks or anything else.

So I would grant you that the world of talking agents could describe our physical world through math, but they could also imagine any other physical world, and they would have no way to choose one.