What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_11, x_11 will listen to a song. For all x_10, if x_10 listens to a song, then x_10 is a poet. For all x_10, if x_10 were a poet, then x_10 is listening to a song.
For all x_10, x_10 will listen to a song if and only if x_10 is a poet. For all x_10, x_10 is a poet if and only if x_10 will listen to a song.