If you close your left eye and look at the left dot with your right eye, the other dot should disappear (you might need to adjust your distance from the monitor). Your eye has a blind spot that uses the surrounding information to fill in the blank space, much like what these deep learning algorithms are doing.
It also reminds me of the "two dot" illusion from psychology: http://i.imgur.com/j8sEFuT.jpg
If you close your left eye and look at the left dot with your right eye, the other dot should disappear (you might need to adjust your distance from the monitor). Your eye has a blind spot that uses the surrounding information to fill in the blank space, much like what these deep learning algorithms are doing.