We got shown this in a lecture, the brain expects one of the squares to be black/white and just imagines it that way. I think it is something like 95% of what you see is made up by your mind, there is just no way the brain can process all that it sees so it makes the rest up on what it reckons is there.
We got shown this in a lecture, the brain expects one of the squares to be black/white and just imagines it that way. I think it is something like 95% of what you see is made up by your mind, there is just no way the brain can process all that it sees so it makes the rest up on what it reckons is there.