To state that you have a college degree on the topic you are debating with someone while being completely wrong about said topic.
During the Covid-19 Pandemic, many students were either given automatic passing grades or failing a class wasn't counted against you. This practice ended up letting students pass classes they shouldn't have or even end up graduating despite not meeting requirements that would otherwise be required had there not been a pandemic.
Person 1: "As someone with a Master's Degree in history from Harvard, only 1 million people died in the Holocaust."
Person 2: "Oh, so you got a Covid Degree."