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_9, x_9 is a cashier. For all x_9, if x_9 were a cashier, then x_9 is running. For all x_9, if x_9 sleeps, then x_9 is playing a game. For all x_9, x_9 will go running or x_9 will not play a game.
For all x_9, x_9 will go running can be inferred via the universal modus ponens rule. For all x_9, if x_9 plays a game, then x_9 is running can be inferred via the universal rewriting rule.