The would strongly point to speech developing around that time, but there's no mention of language or speech in the article - odd.
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the point (which I learned from the book) is how writting transformed human culture but did not define it, humans have a pre-literal (i.e. written) culture whose origin is literally really lost to history
I'm saying that tech transfer can absolutely be speech driven, but I admit that text driven technological transfer is in some ways an improved version of oral-only cultural transmision (i.e. knowledge preservation)