The Maury Povich meme stems from the long-running tabloid talk show, Maury, which became famous for its dramatic paternity test and lie detector segments. The most iconic moments involve Maury opening a brown envelope and announcing, 'You are NOT the father!' often resulting in the guest celebrating wildly. Another popular variant uses the phrase 'The lie detector determined that was a lie' to call out hypocrisy or dishonesty. These formats have been staples of internet culture for decades, used to mock people caught in obvious lies or to celebrate a surprising truth.