Explaining the Flynn Effect

I think this philosophy of testing may explain the dichotomy between the fact that people are getting progressively more intelligent according to IQ tests while becoming observably more stupid in terms of their behavior:

In a pretty amazing YouTube video, Amanda August, a curriculum
coordinator in a suburb of Chicago called Grayslake, explains that
getting the right answer in math just doesn’t matter as long as kids can
explain the necessarily faulty reasoning they used to get to that wrong

“Even if they said, ’3 x 4 was 11,’ if they were able to explain
their reasoning and explain how they came up with their answer really
in, umm, words and oral explanation, and they showed it in the picture
but they just got the final number wrong, we’re really more focused on
the how,” August says in the video.