Maybe most of you have seen this already, as it's been on various social media sites. Apparently, different people perceive this picture in one of two ways, depending on which side of their brain is dominant. It's actually a pink shoe with white laces, but a slightly-greenish blue has been overlaid on the image, dramatically altering the colours of the main elements in the picture. If your left-brain is dominant you will take what you see at face value and see blue laces and a grey shoe. On the