Like what? Usually lacto fermenting requires a specific salt level. I know fruit tends to ferment, but that produces alcohol, which is a negative factor for brains.
Modern humans have genes to process alcohol and some populations don’t have the gene (Asian flushing). Alcohol and fermented fruit were probably sources of calories and drinkable water for many populations.
I'm questioning how this could have preceeded the formation of advanced brains at a level to contribute to the formation of advanced brains.
E.g. https://news.berkeley.edu/2022/03/30/monkeys-routinely-eat-f...
brain health isn't the big factor, it is outweighed by the not heaving out your guts by food poisoning.
This isn't true at all. Beer can go bad and give you food poisoning.
There are a ton of other studies exploring how beer/wine fermentation for alcohol also contributed to early human growth. Precisely because of this property.
try telling that to the parrots in the trees, they're a social animal and seem happy enough.