What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y_3, if y_3 were poor, then y_3 is playing tennis. There is at least one y_3 for which y_3 will drink water if and only if y_3 is poor. For all y_3, y_3 will not play tennis.
For all y_3, y_3 is not poor. There is at least one y_3 for which if y_3 drinks water, then y_3 is poor. There is at least one y_3 for which if y_3 were poor, then y_3 is drinking water.