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The blade technique in tool making, originating from the Upper Paleolithic period, involved the construction of tools resembling modern knife blades. Compared to earlier techniques like the Oldowan and Acheulean, the blade technique suggests notable advances in cognitive abilities. These advancements are theorized to both have precipitated and resulted from changes in sociocultural practices, including the development of languages.
Explanation:
The blade technique of tool making refers to a tool constructing method from the Upper Paleolithic period where humans began constructing tools with thin, flat components with sharp edges, resembling modern knife blades. This technique offers more efficiency compared to the round flakes method used in preceding periods, primarily due to the longer cutting edge. By improving the prepared-core technique of the Mousterian to create pre-shaped blades, humans were able to craft an array of tools.
Two primary theories link advancements in such tool use to language and cognitive development. Firstly, the process of planning and executing tool construction with precision indicates the potential for complex cognitive planning, a skill also associated with the production of intricate speech. The second theory suggests imitation, which is integral in transferring complex skills in tool production, played a pivotal role in spawning the first gestural language among hominins.
Earlier forms of tools, such as Oldowan tools crafted by Homo habilis, were simple stone choppers used for activities like butchering carcasses. The subsequent Acheulean tools, created with a more sophisticated technique, had a symmetrical, two-faced biface design. These tools require more delicate hand-eye coordination, reflecting an improvement in cognitive ability and motor skills in the toolmaker.
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