The researchers then explained the mirror trick to the participants, but that didn't help at all. Even though people consciously knew that the image they were looking at was being manipulated, their brains still made the wrong call because what was wrong felt right. Which sounds like the premise of a bad country song, not the motivations of the glob of meat that makes us sentient.
This isn't really a problem, because unless you're an action movie character, you're not often forced to navigate an elaborate mirror maze. Whenever jerk scientists aren't trying to trick your brain, making automatic judgments based on your vision is a good call, because it works 99% of the time. But this is a good demonstration of how much we rely on our brains to handle countless little tasks on autopilot so that we can focus our conscious brainpower on the big picture, like getting angry about TV shows on Twitter.