What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_8 for which if x_8 climbs a mountain, then x_8 is a janitor. For all x_8, if x_8 were an electrician, then x_8 is a janitor. For all x_8, x_8 is a janitor if and only if x_8 is an electrician. For all x_8, x_8 is an electrician or x_8 will climb a mountain.
There is at least one x_8 for which x_8 is a janitor. For all x_8, if x_8 were a janitor, then x_8 is an electrician. For all x_8, if x_8 were an electrician, then x_8 is a janitor.