What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_5 for which if x_5 were a soldier, then x_5 is a sailor. For all x_5, x_5 is a sailor if and only if x_5 is a soldier.
For all x_5, if x_5 were a sailor, then x_5 is a soldier. For all x_5, if x_5 were a soldier, then x_5 is a sailor.