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: For all x_6, x_6 will climb a mountain or x_6 will work. For all x_6, x_6 will not climb a mountain. For all x_6, if x_6 works, then x_6 is a janitor.
For all x_6, x_6 will work can be inferred via the universal disjunctive syllogism rule.