What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_23, if x_23 listens to a song, then x_23 is a lawyer. Elisabeth is listening to a song. For all x_23, if x_23 were a lawyer, then x_23 is sad. For all x_23, if x_23 were sad, then x_23 is a lawyer.
There is at least one x for which x will listen to a song. For all x_23, if x_23 listens to a song, then x_23 is sad. For all x_23, x_23 is a lawyer if and only if x_23 is sad. For all x_23, x_23 is sad if and only if x_23 is a lawyer.