What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: There is at least one x_8 for which x_8 is bored. For all x_8, x_8 is an office clerk or x_8 will not climb a mountain. For all x_8, if x_8 drinks water, then x_8 is an office clerk. For all x_8, x_8 will climb a mountain or x_8 will drink water.
For all x_8, if x_8 climbs a mountain, then x_8 is an office clerk can be inferred via the universal rewriting rule.