Bards pre-literate-times in Greece purportedly could recite Homer's Odyssey themselves after one hearing. Writing destroyed that all. (Maybe I don't have a citation right off, but I've read that on the web or heard it in some college class years ago ... in any case, ability to retain heard information has likely declined since then). But ... few people complain about how books corrupt our memory. So we're the first g…
That sounds highly unlikely. Do you have a legitimate sources to back this up? Certainly bards had great memory and were able to recite whole epics (perhaps with a level of improvisation akin to "freestyling" in rap), but under what circumstances would they only hear an epic once?