That, and that those changes in the brain might lead to other changes not associated with intelligence at all. Like sleep requirements, haemorrages or fluctuations in blood pressure in the skull, food cravings, etc. Things that belong to physiology and are freely discussed by a much narrower circle of people, in part because even among biologists many people don't like the organismal level of discussion, and doctors are too concerned with not doing harm to consider radical transformations.
Currently, 'rationality' is seen (by me) as a mix of nurturing one's ability to act given the current limitations AND counting on vastly lessened limitations in the future, with some vague hopes of adapting the brain to perform better, but the basis of the hopes seems (to me) unestablished.
Currently, 'rationality' is seen (by me) as a mix of nurturing one's ability to act given the current limitations
That's also more or less how I see it. I am not planning to perform a brain surgery on myself in the near future. :D
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