What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Karen is not a poet. If Joseph listens to a song, then Karen is a poet. For all y, y will listen to a song if and only if y is a police officer.
Joseph is not listening to a song. For all y, if y listens to a song, then y is a police officer. For all y, if y were a police officer, then y is listening to a song.