What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_15, if x_15 plays a game, then x_15 is poor. Robert is playing a game if and only if Elisabeth is listening to a song. Robert is not poor.
If Robert plays a game, then Elisabeth is listening to a song. If Elisabeth listens to a song, then Robert is playing a game.