The sheep in Animal Farm (who repeat talking points independently of applicability or even consistency with the past) were probably a complaint about people not RTFAing in 1945.

If one squints enough, Plato's Cave could be a complaint (circa -375) about opinions via pale shadows of secondary and tertiary sources.

https://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext...

https://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext...