The document is an image in 3D with a robot that holds a human skull. It's intriguing, we can ask why a robot that looks very high-tech exists? And why is it holding a human skull? Did the human civilization fade away? The robot may not know the human, It could be thinking about, to which civilization this skull belongs. The skull is here to make a difference between a human, and a robot. Who is, and who is not? It's like the Shakespearian play: to be or not to be.