So a blind wandering poet would have knowledge of ancient texts about people who wrote in dots and triangles. Or did he just weave a tale based on common themes...
Maybe the idea that ancient cities fell because of similar reasons was kinda universal?
Fascinating, nonetheless....
There may have been an oral tradition as well as a written tradition. An Iliad from the point of view of the Trojans would be fascinating.
Yours is not even close to being a coherent reply.
Obviously, people don’t need to read to know what’s going on around them, or has happened in the past.