>it's not even clear that real numbers are real, See https://en.wikipedia.org/wiki/Real_number https://en.wikipedia.org/wiki/Real_number > whether and how it

>it's not even clear that real numbers are real, See https://en.wikipedia.org/wiki/Real_number https://en.wikipedia.org/wiki/Real_number > whether and how it would physically possible for a real-number based quantity to be present in a finite space If you have a continuous function between two points in space then you need Real numbers.