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