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 z for which if z listens to a song, then z is making tea. For all z, if z makes tea, then z is listening to a song. For all z, if z makes tea, then z is running.
There is at least one z for which if z listens to a song, then z is running. There is at least one z for which z will listen to a song if and only if z will make tea. There is at least one z for which z will make tea if and only if z will listen to a song.