What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? There is at least one x_10 for which x_10 is not poor. For all x_10, x_10 will play squash if and only if x_10 will listen to a song. For all x_10, x_10 is poor if and only if x_10 will play squash.
For all x_10, if x_10 plays squash, then x_10 is listening to a song. For all x_10, if x_10 were poor, then x_10 is playing squash. For all x_10, if x_10 listens to a song, then x_10 is playing squash. For all x_10, if x_10 plays squash, then x_10 is poor. There is at least one x_10 for which x_10 will not play squash.