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 not take a plane. For all x_6, x_6 will take a plane or x_6 will go running. For all x_6, x_6 is a janitor and x_6 will play squash.
For all x_6, x_6 will go running can be inferred via the universal disjunctive syllogism rule. For all x_6, x_6 is a janitor can be inferred via the universal simplification rule. For all x_6, x_6 will play squash can be inferred via the universal simplification rule.