I finally finished this:
Toward the end, they discuss their visit to the Hazda, and she has gone back multiple times. There are different Hazda tribes, but when they discuss a particular tribe, they discuss how the tubers the women foraged and cooked were so fibrous that they ended up spitting out a lot of it. They then stated that people trying to track what this tribe ate would take the whole tuber and say that the Hazda ate a higher fiber diet, even though they didn’t eat most of the tuber.
From this, they concluded that, while there were some carbs from the tubers, the Hazda ate mainly a high meat, low carb diet.
Meanwhile, there’s this guy:
He goes to the Hazda, sees them eating these tubers, and remarks that they (and him, since he ate them too) spit out a lot of the tubers. His conclusion? The Hazda eat (and we should too) a high carb diet.
Ah, what?
Two groups of people seeing the same thing, yet reaching completely different conclusions.
This is why I look for the biases in people. What do they believe? Often, this is what you will get.