Plato (and Socrates) distrusted the unwashed masses to rule themselves; ergo, philosopher-kings. So learning to reading and writing were skills that would be reserved for a small elite.
And that, it seems, to me is a more interesting concept to explore: a Socratic STEM "Republic", where literacy is a monopoly tightly controlled by an techno-oligarchy. And such literacy focuses on STEM subjects (Science, Technology, Engineering and Math). The humanities have been relegated to the delete bin.
This seems to be situation implied in the logline "an Android implanted with humanities history" -- and if that is the case, I think the logline needs a better focus.