@bouncepaw >what's your word if your grandson can't read
I think this is the wrong way around, what's your text if your son can't read? oral traditions far outweigh any text in terms of legacy, here's an example of a standing tradition for 10k years
https://www.scientificamerican.com/article/ancient-sea-rise-tale-told-accurately-for-10-000-years/
that's far longer than any written work has remained understandable by nearly double
historic and scientific evidence currently don't have the ability to prove that statement, here's a link https://www.sciencefocus.com/news/neanderthals-could-talk-like-humans-study-suggests/