Now we are getting into the quantum physics question of if the universe is discrete or continuous. Which seems to be unsolved.
So I guess that’s my answer. If the universe is discrete then there are finite genders, and if it’s continuous then there could be infinite genders.
But guys, if we use agile then we don’t need requirements! We just make something and then the customers tell us if we are on the right track, we just get to iTeRaTe