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 office clerk, then x is an artist. For all x, if x were an artist, then x is an office clerk. There is at least one x for which x is an artist.
There is at least one x for which x is an office clerk. For all x, x is an office clerk if and only if x is an artist. For all x, x is an artist if and only if x is an office clerk.