Stupider may as well be a word. May as well.
They’re catching onto dysgenic trends. It’s the RT finding we all know.
Have they tried comparing this to genetic populations a la Wade? Mass immigration/invasion distorts the results somewhat, as does poor nutrition (slightly), but intelligence is mostly genetic. And the virility of the low-IQ is presently far higher than notoriously sub-replacement Europeans, for example. Then there’s the stupidity of teachers, their average IQ as a profession is less than a substantial number of their students, who are driven down to the lowest common dominator of IQ in their class, and the political propaganda brainwashing, which actively punishes critical thinking. *brushes down hands* I think that covers most of it.