¶ Berry Picking
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Out stones, or by scraping out wood, and finally by forming things together-- batting clay, weaving baskets, and so forth. Once you develop the vessel, you can also begin to make it of materials that can stand up under heat that your hands couldn’t stand. You can make your tool hands much bigger than they had been. You can make them stand acids that your real hands couldn’t. In other words, there is a definite basic function for this tool, but you can greatly extend the limits of that functioning-- sometimes to such a degree that you don’t readily recognize it as an extension of the integral function, as when we get to great tanks and reservoirs. This is something that it is very important to remember about tools.
"Thus, man has not been unique in his having developed tools, but he is unique in the extent to which he employs them. And all of this comes out of his recognizing repeated experiences and realizing that he can anticipate certain conditions and alter them favorably by making such a thing as a vessel.
“As I compare man with other creatures in relation to specialization, I observe that man discovers principles that are”
