evidence: On Oct. 15, 2020, Democratic U.S. presidential candidate Joe Biden took questions during a town hall event aired on ABC News. At one point, Biden was asked by an audience member about the Supreme Court and the possible erosion of LGBTQ rights. As Biden answered, he mentioned something about his life that many viewers apparently found surprising: Biden said that he taught constitutional law for 21 years. [...] While Biden truly taught classes on constitutional law at the school, we're not entirely clear on some of the surrounding details. For instance, Biden was an adjunct professor, which essentially means that this was a non-tenured, part-time position. It's also unclear how often Biden taught these classes. [...] Roll Call added some more details to Biden's teaching history in an article published the same year. The Washington, D.C. news site reported that Biden taught a seminar called "Selected Topics in Constitutional Law" alongside professor Robert Hayman, and that he tried to be present for at least half of the Saturday morning classes.