Recent science fiction works such as Shirow Masamune's Ghost in the Shell have addressed the question of the self by creating worlds in which the self can exist separate from the body it originally inhabited . In the world of Ghost in the Shell, science has progressed rapidly over time to the point where an individual can no longer be identified by their body, and the concepts of personal identity, self, and humanity have been clouded by technology. At the time of the show, the vast majority of the Japanese population possesses what is known as a "cyberbrain." That is, an artificially enhanced biological brain with added components to increase memory capacity and processing speed and which gives users the ability to interface directly with both computers and other people. In some cases, individuals who have suffered severe and life-threatening trauma have had up to 97.5% of their brains replaced with digital components. Most people have at least some cybernetic components in their bodies, and some, termed "cyborgs," have little leftover of the body they were born with. This begins to blur the lines between humans and androids, who are not considered people and therefore have no rights, despite the increasingly limited differences between them and the humans they created