Similar to humans, the lovely Japanese macaques may have cumulative culture, the ability to improve on others' invention, to stand on the shoulders of giants. https://link.springer.com/article/10.1007/s10329-017-0642-7 …pic.twitter.com/WFNz8YfANB
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Matter of degree, not kind. The apes must have some language capacity or they would be unable to produce useful signs at all. Similarly, skyscraper vs. termite mound.
Language is not about signs, but about syntax. And that is about kind, not about degree. .
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