Somehow, I don't think Grok the caveman ate Lara bars, or much fruit or nuts at all. The fruit Grok could find was at the end of summer (tropics excepted) and was quite bitter by our standards.

That may be beside the point, though. "Paleo" people aim for paleolithic people's level of health, not to replicate their diet. Some of us Neolithic types can eat small amounts of neolithic foods e.g., chili w/ beans, 85% chocolate, and not suffer. And everybody in the Paleo community embraces coconut-based products, which weren't available to most Paleolithic peoples.