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 an electrician if and only if x_12 is an astronaut. There is at least one x_12 for which x_12 is an astronaut if and only if x_12 is a server. For all x_12, if x_12 were a server, then x_12 is an electrician.
For all x_12, if x_12 were an electrician, then x_12 is an astronaut. There is at least one x_12 for which if x_12 were an astronaut, then x_12 is a server. For all x_12, if x_12 were an astronaut, then x_12 is an electrician. There is at least one x_12 for which if x_12 were a server, then x_12 is an astronaut.