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 drives a car, then x_8 is playing tennis. For all x_8, x_8 will drive a car or x_8 is bored. For all x_8, x_8 will go running if and only if x_8 will play tennis. For all x_8, if x_8 were bored, then x_8 is playing tennis.
For all x_8, x_8 will play tennis can be inferred via the universal disjunction elimination rule. For all x_8, if x_8 goes running, then x_8 is playing tennis can be inferred via the universal biconditional elimination rule. For all x_8, if x_8 plays tennis, then x_8 is running can be inferred via the universal biconditional elimination rule.