Sufficient causal argument
According to Discovering the World through Debate, a sufficient causal argument is "An argument that states that the presence of a cause virtually guarantees (is sufficient for) the presence of the effect" (250).
Trapp, Robert, et al. Discovering the World through Debate: A Practical Guide to Educational Debate for Debaters, Coaches, and Judges. Third Edition. New York: IDEA Press Books, 2005.