Addressing the slippery slope argument (SSA) in legal contexts from the perspective of pragma-dialectics, this paper elaborates the conditions under which an SSA-scheme instance is used reasonably (rather than fallaciously). We review SSA-instances in past legal decisions and analyze the basic legal SSA-scheme. By illustrating the institutional preconditions influencing the reasoning by which an SSA moves forward, we identify three sub-schemes (causal SSA, analogical SSA, and Sorites SSA). For each sub-scheme we propose critical questions, as well as four rules that (...) clarify when the SSA scheme is used reasonably. The institutional preconditions make the analogical SSA expectable in common law contexts; the Sorites SSA is expectable in civil law contexts; whereas the causal SSA is common to both contexts. This result should inform future work on the identification of typical argumentative patterns for the SSA in legal contexts. (shrink)

Western ethics and law have been slow to come to conclusions about the right to choose the time and manner of one's death. However, policies, practices, and legal precedents have evolved quickly in the last quarter of the twentieth century, from the forgoing of respirators to the use of Do Not Resuscitate (DNR) orders, to the forgoing of all medical technologies (including hydration and nutrition), and now, in one U.S. state, to legalized physician-assisted suicide. The sweep of history—from the Quinlan (...) case in New Jersey to legislation in Oregon that allows physician-assisted suicide—has been as rapid as it has been revolutionary. (shrink)