Sumerian document (dub) was clay tablet (dub) with patterns, symbols gouged, chiselled, written (sar, šar) into it...
In Serbian, the word for chiselling, gouging is "dub" and the word for "making patterns, symbols" is "šar"...
Eee what?
How can such important words in Sumerian, language isolate, have roots in Serbian, totally unrelated IE language, which only appeared after Sumerian language died out?
oldeuropeanculture.blogspot.com/2018/03/breath…
oldeuropeanculture.blogspot.com/2018/08/sickle…
bulgari-istoria-2010.com/Rechnici/Sumer…
is.muni.cz/el/1421/jaro20…
psd.museum.upenn.edu