What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? For all x_8, x_8 will play tennis or x_8 will not climb a mountain. For all x_8, x_8 will play tennis if and only if x_8 will climb a mountain.
For all x_8, if x_8 climbs a mountain, then x_8 is playing tennis. For all x_8, if x_8 plays tennis, then x_8 is climbing a mountain. For all x_8, if x_8 climbs a mountain, then x_8 is playing tennis.