How do we see colour? Can white look blue and vice versa? And does it matter which word you use for a colour? Apparently it does.
What is the boundary of your body? Where does your body end? All fairly clear to you, but not to your brain. A rake you hold in your hand can become a part of your body, and sometimes a rubber hand can seem like your real hand. How can this be?
You walk down a street and nearly bump into someone; you look at their face and in a fraction of a second you know who it is. It does not really matter if you see them in profile or full face. And one can do this with thousands of faces; a clever trick of our brains. How do we recognise faces?
How would we manage, if we could not visualise three-dimensional objects from flat two-dimensional diagrams? An amazing feat our brain performs. What role does predetermined programming play in this? That is related to how the sun shines on us.
Are you sure you see the reality out there? That is the question. You look with your eyes, but you see with your brain. And the brain does not receive an image like a camera does. The brain is not a passive processor. What you see is constructed in the brain. How do you see with your brain?