What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_12, x_12 is a nurse. For all x_12, if x_12 were a soldier, then x_12 is not a nurse. Jessica is drinking water if and only if Karen is a soldier.
If Jessica drinks water, then Karen is a soldier. If Karen were a soldier, then Jessica is drinking water. For all x_12, x_12 is not a soldier.