Anthony Jack, an assistant professor in cognitive science at Case Western Reserve University and lead author of the study, relates the idea to an optical illusion. You can see a duck or a rabbit in the image, but not both at the same time. This limitation to what you can see is called perceptual rivalry. Jack's new study takes this concept beyond visual perception, and investigates how the brain processes situations. It found separate neural networks for social/emotional processing and for logical analysis.