What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all y_1, if y_1 climbs a mountain, then y_1 is playing tennis. For all y_1, y_1 will drink water or y_1 will not climb a mountain. For all y_1, if y_1 plays tennis, then y_1 is climbing a mountain.
For all y_1, if y_1 climbs a mountain, then y_1 is drinking water. For all y_1, y_1 will climb a mountain if and only if y_1 will play tennis. For all y_1, y_1 will play tennis if and only if y_1 will climb a mountain.