Denis Sinor (1999:396), a distinguished linguist and historian of Central Asia, takes a position that more might consider: “I find it impossible to attribute with any degree of certainty any given language to any given prehistoric civilization.”
Notes from Wikiquote
Sinor , Denis . 1999. “Some thoughts on the Nostratic theory and its historical implications,” in Nostratic: Examining a linguistic macrofamily. Edited by Colin Renfrew and Daniel Nettle. Cambridge: McDonald Institute.