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, if x_9 plays squash, then x_9 is driving a car. For all x_9, if x_9 were a writer, then x_9 is playing squash. For all x_9, x_9 will climb a mountain or x_9 is a writer. For all x_9, if x_9 climbs a mountain, then x_9 is running. For all x_9, if x_9 goes running, then x_9 is driving a car.
For all x_9, if x_9 were a writer, then x_9 is driving a car can be inferred via the universal transitivity rule. For all x_9, if x_9 climbs a mountain, then x_9 is driving a car can be inferred via the universal transitivity rule.