Emulators are software that let you simulate another piece of hardware.
Want to run your old school nintendo games on your new college PC?
You can do that with an emulator.

According to some philosophers, mathematics is not an absolute truth, but an emulation of the Universe.
You can describe, predict and simulate the Universe. but only using the right kind of mathematics.

Godel found out, with his incompleteness theorem that
certain truths are unprovable within certain forms mathematics
Eucleadian Geometry can be great at emulating flat surfaces
But you need non-Eucleadian Geometry to emulate geodesics or hyperbolic surfaces

So like choosing the spices for your chai tea
Ponder dear friend, what kind of game you are in.
The math that guides you, in this grand emulation you are in
Will define the stories that you tell to your kin.