According to your textbook, what type of fallacy is the following statement? If voluntary euthanasia is to be legalized, it would prove impossible to avoid the legislation or, at least toleration, of nonvoluntary euthanasia. But, even if the former can be justified, the latter clearly cannot. Hence, it is better that the first step (legalizing voluntary euthanasia) not be taken so as to prevent a slide into non-voluntary euthanasia.