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_17, if x_17 goes running, then x_17 is climbing a mountain. If Karen plays tennis, then Richard is running. If Richard climbs a mountain, then William is a bartender. If William were a bartender, then Karen is playing tennis.
If Richard climbs a mountain, then Karen is playing tennis can be inferred via the transitivity rule. If William were a bartender, then Richard is running can be inferred via the transitivity rule.