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, if x_8 climbs a mountain, then x_8 is playing a game. For all x_8, x_8 is an office clerk. For all x_8, x_8 will not go running. For all x_8, if x_8 were sad, then x_8 is playing a game. For all x_8, x_8 will go running or x_8 will climb a mountain.
For all x_8, x_8 will climb a mountain.