Interestingly enough, IQs are now decreasing in the western world and have been since around the mid 90s. There were numerous studies showing this quite clearly

Interestingly enough, IQs are now decreasing in the western world and have been since around the mid 90s. There were numerous studies showing this quite clearly in 2013 (when that talk was given) but now it seems every study is corroborating it. Perhaps we can assume he simply felt it required more research as an explanation for why he would give such an ostensibly misleading talk. Linking to another comment chain here [1] on this topic as this is something multiple people have also brought up as an argument against grade inflation. Unfortunately, it makes the inflation look even more absurd. https://news.ycombinator.com/item?id=17447692 https://news.ycombinator.com/item?id=17447692