I wonder why the researcher puts such an emphasis on language in particular. I mean, I'm sure that the researcher knows a heck of a lot more about it than I do, but the video left me with the impression the cognitive trade off was that we compromised our memory in exchange for the ability to imagine. The very concise memory of the chimps is maybe an inability to imagine the numbers being anywhere other than where they saw them. Our memories are a mixture of imagination and facts and we are routinely unable to discern the difference. So we are more prone to saying, "I think the 3 was there. Or was it there? Oh, crap. I don't remember." Since the chimp can't imagine the 3 being anywhere other than where they saw it, they don't have that problem.
We do not inherit the world from our parents. We borrow it from our children.
