Gee, I dunno.
First: How long did hunter-gatherer mothers nurse their young with human breast milk?
And then when they weaned their kids, what solid food did they give them--straight meat if old enough or maybe insects--like soft grubs--or vertebrate meat chewed by an adult? Vegetables? Roots?
I'd like to know.
But in learning this, one must take care not to consider hunter-gatherers outside their ideal habitat; for example--not Eskimos.
Mabye African Bushmen or the remoter South American tribes (though none of either has escaped some changes to their traditional ways by the encroachment of civilization).
I wonder if the two-sets of teeth humans grow has something to do with the diet of young; if so , that might be a clue as to what human young were designed to eat.