Yeah I've seen that error all over the place. And I understand her Ed.D. "degree dissertation" was about as scholarly as a high school term paper - maybe less.
In his December 17, 2020, article, "Jill Biden’s Garbage Dissertation, Explained," Kyle Smith states:
"Mrs. Biden’s only original research consists of interviews with two — that’s right, two — ex-students and a few colleagues at Delaware Technical Community College, where she used to teach, plus the results of a vacuous questionnaire she wrote that was returned by about 150 people who worked or studied there. Oh, and she also called two nearby community colleges seeking interviews about their retention rates. One of them wouldn’t answer the question; the other wouldn’t assign anyone to speak to her at all. Telling us about this misadventure serves no academic purpose, though it does fill up four pages of her generously spaced paper. The transcripts of her group chats with campus figures and colleagues take up nearly 30 pages out of 129. The questionnaires eat up another 18 pages.Then Kyle Smith really begins to tear into Dr. Jill's dissertation.
"The dissertation, Student Retention at the Community College: Meeting Students’ Needs, shimmers with the wan, term-papery feel of middle school, although in defense of today’s middle schoolers, they at least know how to use spell-checking software, unlike Mrs. Biden."