Zero to one is closer to mimicry and immersion. There's a long Wikipedia article on the field of study https://en.m.wikipedia.org/wiki/Language_acquisition

Furthermore, humans probably aren't static learners and likely have more beneficial times of certain study than others. There's a theory in that too https://en.m.wikipedia.org/wiki/Critical_period_hypothesis

Saying there's a "digital brain" is more of a framework since the term "brain" looks like it's a moving target

In another comment I referred to these systems as like comparing hydraulic pumps to human biceps, cars to horses, etc.

We can use the same units of measure, give them the same tasks, but saying they're the same thing only works in the world of poetry

If you give it a small enough training set or a big enough neural network, it will directly memorize the whole thing. You have to intentionally make its brain too small to do that in order to force it to find patterns in the data instead.