What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_6, if x_6 were a nurse, then x_6 is not an astronaut. For all x_6, x_6 will work if and only if x_6 is a nurse. For all x_6, x_6 is an astronaut. There is at least one x_6 for which x_6 will go running if and only if x_6 will work.
For all x_6, x_6 is not a nurse. For all x_6, if x_6 works, then x_6 is a nurse. There is at least one x_6 for which if x_6 goes running, then x_6 is working. For all x_6, if x_6 were a nurse, then x_6 is working. There is at least one x_6 for which if x_6 works, then x_6 is running.