From Newsgroup: talk.origins
https://www.science.org/content/article/imagination-isn-t-just-humans-famous-ape-shows
The claim is the experiment demonstrated that Kanzi could pretend that imaginary liquid was being dispensed by empty containers, and that he
could also pretend that the imaginary liquid could be poured back into
the empty container leaving an empty glass.
The claim is that such an ability could have developed millions of years
ago.
Ron Okimoto
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