Power Clean wrote:so why can't we infer that when one of those snakes hits six months with the disease it will die from it, if not sooner?
Let's say that there are a half-dozen snakes hatched in North America that have the disease. Every one of them dies before reaching six months old; three escape their cages and are eaten by other pets, two of them are accidentally starved by inattentive owners, and the sixth dies from a disease completely unrelated to the one discussed in the question.
In this case, the scenario described in answer choice 'A' never comes to pass; none of the North American snakes died as a result of the liver disease at all. That's why I agree it's a bad question, *if* LSAC considers "can properly be inferred" to be identical to "must be true".