The Doomsday Argument says that we should expect to be typical people: this is the "self-sampling assumption". Hence, we should expect to be roughly in the middle of humanity's birth order. But since the population has grown exponentially, being in the middle of humanity's birth order implies being close to the end of the world. Hence, the end is nigh.
But I have evidence against the self-sampling assumption. The self-sampling assumption predicts that I am typical. But I am not: I am weird.