The contretemps, two and a half years ago, over First Lady Jill Biden’s problematic degree and her too-earnest desire to be addressed as “Doctor” opened discussion about a problem in higher education that didn’t go quite far enough. Just what is this “EdD,” and why is this chit so important to so many people—but only the people who clutch it tightly, even as they behave as if, at any moment, they may be found out? It is impolite and sometimes impolitic to point out the clear and documented deficiencies of advanced degrees in “higher education,” of the people who teach...