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 y for which y will work if and only if y will go running. For all y, if y goes running, then y is an artist. For all y, if y were an artist, then y is running.
For all y, y will go running if and only if y is an artist. For all y, y is an artist if and only if y will go running. There is at least one y for which if y works, then y is running. There is at least one y for which if y goes running, then y is working.