ollege is all about opportunity costs. One way of viewing A.I. is as an intervention in how people choose to spend their time. In the early nineteen-sixties, college students spent an estimated twenty-four hours a week on schoolwork. Today, that figure is about fifteen, a sign, to critics of contemporary higher education, that young people are beneficiaries of grade inflation—in a survey conducted by the Harvard Crimson, nearly eighty per cent of the class of 2024 reported a G.P.A. of 3.7 or higher—and lack the diligence of their forebears. I don’t know how many hours I spent on schoolwork in the late nineties, when I was in college, but I recall feeling that there was never enough time. I suspect that, even if today’s students spend less time studying, they don’t feel significantly less stressed. It’s the nature of campus life that everyone assimilates into a culture of busyness, and a lot of that anxiety has been shifted to extracurricular or pre-professional pursuits. A dean at Harvard remarked that students feel compelled to find distinction outside the classroom because they are largely indistinguishable within it.