Socrates learns about Zeroes

The Just City - Jo Walton

"'Those are numbers?  How do they work?'


I wrote them down in the dust, from one to ten, and showed him. 'That's all there is to it.'. . .


He understood it at once.  'And you have all known all this time and never mentioned it to me?' he said.


'It never occurred to me that you didn't know,' I said.


'Pah.  My ignorance is vast and profound.  I like to know at least what I do not know.'"



ETA, not because it has to do with numbers, but just because I like the quote:


"'They're not. They're tools.  Everyone knows that.'


'What everyone knows, Socrates examines.'"