Oh that brain of ours! Its indeed such a remarkable machine! So complicated and so powerful, yet it can be easily tricked. Take for example the optical illusions... Its not just a glitch with our eyes, its a glitch that occurs both in our eyes and our brains. Have you ever thought, why we see optical illusions? Why this remarkable ultra super computer -our brain- can be so easily tricked? If not, then i strongly suggest this video from Ted education with Mark Changizi speaking about the fact that the power of our brain to predict the near future is the reason that it can be fooled from time to time.