Introduction Imagine being trapped in a box. You are chained to the floor alongside others in the same situation, but being chained, you cannot see them, and your only sense impression consists of shadows on the wall in front of you. You have no idea of where the shadows are coming from or what is causing their presence. You assume the sounds you hear come from the shadows, as you have no other way of explaining their coherence. You cannot turn around, nor stand. Does this sound like a nightmare? Read more [...]