“...stone artifacts dating as far back as 92,000 years ago...”
Stone can’t be dated; how did they arrive at 92,000 years?
I assume they used some form of sedimentary dating. Find organic material at a certain depth, carbon date it at 92k and stone items found at the same depth correlate to that date.
There are dozens of different methods for estimating ancient ages.
Typically more than one method is available at any site and they are used to cross-check each other.
Carbon-14 is not usually effective back to 92,000 years, but other methods can be, including luminescence dating.
Stone can absolutely be dated, especially if it was heated by fire—archaeomagnetic dating.