Duke of Clarence of King Edward IV, in 1461. The Duke forfeited his title in 1478, after he had been convicted of treason against his brother. He allegedly met his end (according to William Shakespeare) by being drowned in a butt of Malmsey. A fourth creation in England was suggested and planned to take effect; the title of Duke of Clarence was going to be given to Lord Guilford Dudley, husband of Lady Jane Grey, upon her coronation, as she declined to make her husband king consort. However, she was deposed before this could take effect. Two double dukedoms, of Clarence and St
Brain in a vat First Philosophy". Brain-in-a-vat scenarios—or closely related scenarios in which the protagonist is in a virtual reality simulation and unaware of this fact—have also been used for purposes other than skeptical arguments. For example, Vincent Conitzer uses such a scenario to illuminate further facts—facts that do not follow logically from the physical facts—about qualia (what it is "like" to have specific experiences), indexicality (what time it is "now" and who "I" am), and personal identity. Specifically, imagine a person in the real world who is observing a simulated world on a screen, from the perspective of one of the simulated agents