We only need brains when we're alive, so extracting the points isn't required.

In terms of brains, the math is used to model the irreducible occurrences in brains - that everything is still in there. So the math only gives us a window into the complexity. Brains don't compute or calculate necessarily. As an analog, or analoga of differences, it never has to exclude, or experience loss.

For the details: Rhythms of the Brain or Unlocking the Brain both volumes.