Doctor
Merriam-Webster, “The History of ‘Doctor,’” n.d., https://www.merriam-webster.com/words-at-play/the-history-of-doctor
Monica Hesse, “The Wall Street Journal column about Jill Biden is worse than you thought,” Washington Post, December 13, 2020, https://www.washingtonpost.com/lifestyle/style/dr-jill-biden-wall-street-journal/2020/12/13/e43883a4-3d45-11eb-8db8-395dedaaa036_story.html