What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_11, x_11 is a doctor or x_11 is not a soldier. For all x_11, if x_11 were a lawyer, then x_11 is a soldier. For all x_11, x_11 is a doctor if and only if x_11 is a lawyer.
For all x_11, if x_11 were a soldier, then x_11 is a doctor. For all x_11, if x_11 were a doctor, then x_11 is a lawyer. For all x_11, if x_11 were a lawyer, then x_11 is a doctor.