What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_7, if x_7 works, then x_7 is a nurse. For all x_7, x_7 will not work. For all x_7, x_7 will cook or x_7 is a nurse. For all x_7, x_7 will not cook or x_7 is a sailor. For all x_7, if x_7 were a nurse, then x_7 is working.
For all x_7, x_7 is not a nurse. For all x_7, x_7 is a nurse or x_7 is a sailor. For all x_7, x_7 will work if and only if x_7 is a nurse. For all x_7, x_7 is a nurse if and only if x_7 will work.