“…It has nothing to do with social identity writ small in artifact form, the mental templates by which formal similarity is conveyed, nor lithic traditions passed down from one generation to the next. The rationale for the approach is explicated elsewhere (e.g., Barton, 1991Barton, , 1998Clark & Riel-Salvatore, 2006) but is based on solid evidence that-with very rare exceptions-all Pleistocene sites are palimpsests, depositional composites that do not reflect the contemporaneous activities of any narrowly circumscribed group of people (see, e.g., Barton, 1991;Barton & Clark, 2021;Barton & Neeley, 1996;Clark & Barton, 2017). Put another way, no face-to-face interaction drives a pattern in the coarse-grained time/space grid of the archeology of "deep time".…”