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_3, x_3 will not cook or x_3 is poor. For all x_3, if x_3 drives a car, then x_3 is a carpenter. There is at least one x_3 for which if x_3 plays squash, then x_3 is a carpenter. For all x_3, if x_3 were poor, then x_3 is driving a car. For all x_3, x_3 will cook or x_3 will play squash.
For all x_3, if x_3 were poor, then x_3 is a carpenter can be inferred via the universal transitivity rule. For all x_3, x_3 will play squash or x_3 is poor can be inferred via the universal resolution rule.