What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all z, if z listens to a song, then z is curious. There is at least one z for which if z were curious, then z is listening to a song. For all z, z will listen to a song and z is an electrician.
For all z, z will listen to a song. For all z, z is an electrician. There is at least one z for which z is curious if and only if z will listen to a song. There is at least one z for which z will listen to a song if and only if z is curious.