I haven’t read it but I don’t think this kind of example talks directly to the question of whether rationality is a strongly heritable trait independent of IQ. My current hypothesis (not strongly held or supported by large amounts of evidence) is that rationality is more a learned skill or habit of thinking which will tend to correlate with IQ (because higher IQ people will learn it easier/faster and apply it better) but that some high IQ people have failed to learn it and some lower IQ people have become quite good at it.
Examples of lower IQ people who are more rational than higher IQ people do not on their own help to distinguish whether rationality is a separately heritable trait from IQ or a learned habit of thinking.
I would not be hugely surprised if certain big 5 personality traits or other potentially heritable personality traits made people more inclined to learn rational thinking which might provide an indirect basis for heritability of rationality.
I haven’t read it but I don’t think this kind of example talks directly to the question of whether rationality is a strongly heritable trait independent of IQ. My current hypothesis (not strongly held or supported by large amounts of evidence) is that rationality is more a learned skill or habit of thinking which will tend to correlate with IQ (because higher IQ people will learn it easier/faster and apply it better) but that some high IQ people have failed to learn it and some lower IQ people have become quite good at it.
Examples of lower IQ people who are more rational than higher IQ people do not on their own help to distinguish whether rationality is a separately heritable trait from IQ or a learned habit of thinking.
I would not be hugely surprised if certain big 5 personality traits or other potentially heritable personality traits made people more inclined to learn rational thinking which might provide an indirect basis for heritability of rationality.
I wasn’t reading carefully, so I just offered evidence that rationality is somewhat independent of IQ.