the difference between pseudo-science and science can be slight, and always better understood in hindsight. IQ was a big part of race science in the early 1900s, and it looks like science. It’s objectively measured, systemic data. You’ve gotta take a step back to realise it’s bullshit and too subjectively defined to be useful for anything. A big part of science is trying to think objective, and it’s only been somewhat recently there’s been a movement to remind people that they aren’t actually objective, ever.