Not Dan Mullen or Flavia, though.
This is it. Remember when Pat started doing Duolingo for Spanish and said that he needed to "re-learn" Spanish because he'd previously "mastered" it? Well, all of that Spanish knowledge from over 20 years prior was from only TWO years of HS Spanish:
x.com
And not only that, but he "retained" more from a few months of Duolingo than he did from those two years of High School Spanish. I will pay Pat $10,000 cash if he can post a video of himself to social media having a five minute conversation with someone in Spanish.