Emma, while I applaud your idealism, I fear you may be mistaken regarding a key point. As ethnologists know, speculating about the adaptive purpose of a trait is futile; it's necessary to go into the wild and see how the trait is actually used. When it comes to the human brain, one theory posits that the function of the brain is to process sensory data, form mental models, and enable some rudimentary reasoning to be performed. Observational data from the field, however, overwhelmingly supports an alternative hypothesis: the human brain is simply 1.45kg of ballast, the purpose of which is to stop the head bobbing about when people walk.

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