Consider the following premises. For all x_6, x_6 is not a soldier. Barbara is a janitor or Elisabeth is a sailor. For all x_6, if x_6 were a janitor, then x_6 is a soldier. Can we infer the following from them? Elisabeth is not a sailor.
 From the fact that for all x_6, if x_6 were a janitor, then x_6 is a soldier, and that for all x_6, x_6 is not a soldier we can infer that for all x_6, x_6 is not a janitor. From the fact that for all x_6, x_6 is not a janitor we can infer that Barbara is not a janitor. Finally, from the fact that Barbara is a janitor or Elisabeth is a sailor, and that Barbara is not a janitor we can infer that Elisabeth is a sailor, which contradicts that Elisabeth is not a sailor. Therefore, the answer is no.