 Even supposing that the distinction between acts and omissions, and the associated distinction between killing and letting die, can be satisfactorily clarified (on which see the entry  doing v. allowing harm),  there remains the issue of whether these distinctions have moral significance in any particular circumstance. Consider a case of a patient suffering from motor neurone disease who is completely respirator dependent, finds her condition intolerable, and competently and persistently requests to be removed from the respirator so that she may die. Even the Catholic Church in recent times has been prepared to agree that it is permissible, in a case like this, to turn off the respirator. No doubt this has been because the Catholic Church considers such a patient is only being allowed to die. Even were it to be agreed, for the sake of argument, that such a death should be regarded as an instance of letting die, this concession would not show that it would have been morally worse had the patient been killed at her request (active voluntary euthanasia) rather than being allowed to die (passive voluntary euthanasia). Indeed, supporters of voluntary medically assisted death maintain that since death is beneficial in such an instance (or, at the very least, leaves the dying person no worse off), actively bringing about the death is morally to be preferred to just allowing it to happen because the desired benefit is achieved sooner.