Soandso
ᛋᛏᚨᚾᛞ ᛋᚢᚱᛖ
Well it did not have a sign 9500 BC did it?
Why would anyone look for anything based on written language for something that ancient when the earliest written language found dates to 3100 BCE? I know your comment is just a dismissive "joke" meant to make a "point," but you are being presented hard evidence and in response to that you ask for for standards that don't exist in reality and never will? Eh...
It's like forensic scientists have gathered all this evidence for a murder trial to show how the suspect committed the crime and the judge dismissively says "well did the murderer write a sign that says my name is Michael Jones and I did it?" In response to the evidence. Yikes