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, x_9 is not a carpenter or x_9 will cook. For all x_9, x_9 is not a sailor or x_9 is a politician. For all x_9, x_9 is a sailor or x_9 is a carpenter. For all x_9, if x_9 cooks, then x_9 is an electrician. For all x_9, if x_9 were a politician, then x_9 is an electrician.
For all x_9, x_9 is a carpenter or x_9 is a politician can be inferred via the universal resolution rule.