Hi Frans,
I think the conclusion from the scientists that created that piece is faulty.
Cooked food may have helped in the development of humankind - but not because it is superior or more healthy or does need less energy to digest. No, it just did help, that it was available more often. Cooked food did increase the range of foods we could eat and thus helped us to survive in climates and times where food was scarce.
But in days of abundance (through technology and cleverness) there is no need to eat suboptimal food anymore.
For the theory that cooked food is easier to digest - Test it Yourself:
Eat 800 Kcal of Green Smoothie on one day and 800 kcal of chicken with potatoe chips and tell me each time how you feel afterwards (energywise). So, what did actually take more energy to digest?
One more thing: In the article I found that little piece of wonderful selective perception:
Quote:
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Devoted followers [of the raw food movement] end up, said Khaitovich, "with very severe health problems."
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To that I have to say: I certainly see more people on a cooked food diet that have really severe health problems.