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: There is at least one x_13 for which x_13 will not play squash. For all x_13, x_13 will not drink water or x_13 is excited. For all x_13, x_13 will drink water or x_13 will play squash. For all x_13, x_13 will cook.
For all x_13, x_13 will play squash or x_13 is excited can be inferred via the universal resolution rule.