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_7, if x_7 were poor, then x_7 is not playing squash. For all x_7, x_7 will play squash. For all x_7, x_7 is a soldier or x_7 is poor. There is at least one x_7 for which x_7 is not a soldier or x_7 will go running.
For all x_7, x_7 is not poor can be inferred via the universal modus tollens rule. There is at least one x_7 for which x_7 is poor or x_7 will go running can be inferred via the existential resolution rule.