I dunno, if we account for the whole mosaic I think there is a higher probability of younger Cornell undergraduates performing poorly and self-assessing highly.

I dunno, if we account for the whole mosaic I think there is a higher probability of younger Cornell undergraduates performing poorly and self-assessing highly. They could very well be thinking, and especially against the backdrop of their high school peers, that they know it all. I think the explanation of "You don't know what you don't know." with a splash of "I'm the top 10% of my public high school class!" moreover I'd operate with the presumption they don't read outside of the curricula and so they're exceedingly unaware of the boundaries of their knowledge within the bounds of all knowledge, and the scope of the surface they cover. It's a wonder that they're as accurate as they are. But I think that has to do with the nature of the test, which as I recall was something like the ACT/SAT where they're effectively only testing to 8th grade standards. What happens if they test people against the whole of human knowledge?