I am worried, Kennaway, that our conversation about my way of valuing things will distract you from what I wrote below about the risk of post-traumatic stress disorder from a surgical procedure. Your scenario is less than ideal for exploring what intrinsic value people assign to internal experience: it is better to present people with a choice of being killed painlessly and being killed after 24 hours of intense pain and then asking what benefit to their best friend or to humanity would induce them to choose the intense pain.