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: If it is late, then it is cloudy. If Elisabeth plays tennis, then it is cloudy. For all x_9, x_9 will play tennis. If Elisabeth were an office clerk, then it is late.
If Elisabeth were an office clerk, then it is cloudy can be inferred via the transitivity rule.