
I don't understand that. What academic believes that all knowledge is already known?
Wasn't Bohr an academic? He was President of the Royal Danish Academy of Arts and Sciences, a foreign member of the Royal Netherlands Academy of Arts and Sciences, he won a gold medal competition sponsored by the Royal Danish Academy of Sciences and Letters.
That really sounds like an academic researcher, which you seem to suggest is impossible.
BTW, your Bohr quote appears to be from Teller (https://www.sciencedirect.com/science/article/abs/pii/004316... ), who attributed it to Bohr (https://www.era.lib.ed.ac.uk/bitstream/handle/1842/28983/McG... )
I prefer:
“An expert is someone who knows some of the worst mistakes that can be made in his subject, and how to avoid them” - Werner Karl Heisenberg (1971) Physics and beyond: Encounters and conversations
and:
"you must learn from the mistakes of others—you will never live long enough to make them all yourself" - https://quoteinvestigator.com/2018/09/18/live-long/
The ideas presented by Plato may become outdated, but the mode of thinking required to challenge those ideas does not. Plato was not only conveying his thoughts, he was trying to teach us how to think.