> the other is that there was an approach that made the task easier than we expected.
from reading Dennett's philosophy, I'm convinced that that's how human intelligence works - for each task that "only a human could do that", there's a trick that makes it easier than it seems. We are bags of tricks.
We are trick generators, that is what it means to be a general intelligence. Adding another trick in the bag doesn't make you a general intelligence, being able to discover and add new tricks yourself makes you a general intelligence.