Should potato washing be considered “culture?”

At the time, the development and transmission of new behaviors such as potato washing among Japanese macaques was not recognized as culture by Western zoologists. Later, however, various tool-using behaviors by chimpanzees in Africa proved the existence of cultural behaviors in non-human primates.*

■References (Books, papers, Web articles, etc.)
In the Shadow of Man  Jane Goodall Mariner Books; 50th Anniversary of Gombe edition (April 7, 2010)
文化の誕生』  杉山幸丸 (京都大学学術出版会、2008)

*Wild chimpanzees use tools such as long slender branches for scooping ants (called “ant fishing”) and stones for breaking nut shells.

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