That kind of understanding has a philosophical limit to what it can describe though - consider that an alien being, with an alien physiology would still experie

That kind of understanding has a philosophical limit to what it can describe though - consider that an alien being, with an alien physiology would still experience what we would call pain, without the c-fibers firing. https://en.wikipedia.org/wiki/Philosophical_zombie https://en.wikipedia.org/wiki/Philosophical_zombie