I had people arguing with me about blue blood long after the internet was available to everyone. I wouldn't ever tell them they were stupid, but I would say, "I don't think that's right" and they would usually say they learned it in biology or a science class in high school and I would say, "that still doesn't sound right. We should look that up later when get home to our computers" and then They would look at me like I was the idiot for suggesting they were misinformed in school... because you know... school teachers NEVER misinform their students... like ever 🙄
Speaking of misinforming your students; shout out to Miss O'Leary for saying Russia could Invade Canada with Tanks because we were landlocked during the colder months via the arctic.