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_8, x_8 will work. For all x_8, x_8 is a politician or x_8 will climb a mountain. For all x_8, x_8 is not a politician. There is at least one x_8 for which if x_8 works, then x_8 is a sailor.
There is at least one x_8 for which x_8 is a sailor can be inferred via the existential modus ponens rule. For all x_8, x_8 will climb a mountain can be inferred via the universal disjunctive syllogism rule.