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, if x_8 cooks, then x_8 is playing a game. If David plays a game, then David is running. For all x_8, if x_8 goes running, then x_8 is cooking. David is not running.
For all x_8, if x_8 goes running, then x_8 is playing a game can be inferred via the universal transitivity rule.