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_7, x_7 will not go running. For all x_7, x_7 will listen to a song and x_7 is a janitor. For all x_7, x_7 will go running or x_7 will work.
For all x_7, x_7 will work can be inferred via the universal disjunctive syllogism rule. For all x_7, x_7 will listen to a song can be inferred via the universal simplification rule. For all x_7, x_7 is a janitor can be inferred via the universal simplification rule.