We can, via simulations, deduce what a world with an infinitely fine grid (or no grid, depending on your preferred language) would be like. Is our world like t

We can, via simulations, deduce what a world with an infinitely fine grid (or no grid, depending on your preferred language) would be like. Is our world like that world? If not, then there must be a grid at the bottom that is only finitely fine. See my top-level comment for more detail.