The Reverse Supersized Me of McDonald's

McDonald's hired a high school coach to prove that McDonald's was fine and they did this big splash. And I took it seriously because I wanted to see the long term, well, there's none. He didn't just come in and supersize me, okay? But he also started walking for a long time every day. So if you have three variables, so he didn't supersize me. That's variable number one. Number two, he exercised. The classic issue with any study. Now you'd have two things. And science is about we're gonna have one variable and see what happens. When you have two variables, you can’t figure out what happens.