Voluntary euthanasia is when someone asks to be allowed to die or to be killed. This is often seen as the best option by people who believe in euthanasia, because it is clear that the person wants to die. If the person can not say that they want to die, but people think that they would ask to die if they could, then it is "non-voluntary euthanasia." Non-voluntary euthanasia is a choice for people who are in a coma or who are very young, as they can not say what they want. "Involuntary euthanasia" is when someone is killed even though they asked not to die, or when they could have asked to die but did not. Many people think that this is murder, not euthanasia.