"For this invention will produce forgetfulness in the minds of those who learn to use it, because they will not practice their memory. Their trust in writing, produced by external characters which are no part of themselves, will discourage the use of their own memory within them. You have invented an elixir not of memory, but of reminding; and you offer your pupils the appearance of wisdom, not true wisdom, for they…
Plato was largely right though, when looking at the individual alone. It is still a problem, thinking you understand something because you could look it up. It permits hypothetical access to facts but not the synthesis of knowledge from those facts. Anyone reading this could look up the latin terms "manus" and "facere", but unless they do, they probably won't spontaneously understand the etymology of "manufacture" as…
He didn't want or believe that the lower-class Athenians should have access to education. He very much believed in an Oligarchy where the State would be ruled by a select few.