Discussed at the time: <a href="https://news.ycombinator.com/item?id=8330467" rel="nofollow">https://news.ycombinator.com/item?id=8330467</a>
I wonder if a major difference between humans and other creatures that learn is that humans explicitly teach (repetition with the intention of passing on knowledge to a specified target) while other species just pick things up on their own by observation and reasoning. No idea if those descriptions are true.