I’m sure I’m not the first to note it, but there is a kind of irony in Scott and the gang using such a clear example of a motte-and-bailey argument (got to find a better phrase for that. Maybe some pithy reference to Patton at Calais to maintain the history theme? Inflatable Tank Defense?) in regards to IQ. When talking among friends they treat IQ tests like they are a strong correlate with innate intelligence, no caveats. As such IQ test scores are a reason to ignore environmental factors and not bother investing in equity-minded interventions. But when someone makes the obviously racist conclusion too visible, the argument shifts to be about how actually the correlations between IQ and environmental factors are obvious and really this supports anti racism. It’s a straightforward form of decontextualization that relies on completely ignoring the entire history and contemporary arguments around IQ to defends a single data point. Of course once everyone agrees with that data point they can go right back to the wildly racist nonsense that they were doing in the first place.
If only someone had written a pretty interesting case study in how you can use valid-looking data to prove anything, even the existence of psychic powers. And people have been trying to scientifically justify racism for just about as long as the scientific method has been a thing, while studying psychic powers didn’t really pick up until the latter half of the 20th century.