The familiar debate concerning Middle Paleolithic variability has opposed stylistic vs. functional explanations based on the assumption that tool types and assemblage groups represent discrete, invariant entities. Middle Paleolithic variability, however, actually occurs continuously. Further, recent research shows that raw-material constraints and different degrees of artifact-reduction intensity constitute more basic and observable factors of variability than function and style. Thus, much of the variability in these assemblages appears to have been caused by toolmaking and tool-rejuvenation processes and/or by differential occupation intensity induced by environmental circumstances. The correct interpretation of these Middle Paleolithic assemblages must therefore consider these factors, as well as interregional stylistic drift, function, and diachronic change.
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