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_6, x_6 will take a plane or x_6 is a lawyer. For all x_6, x_6 is a sailor or x_6 is not a lawyer. There is at least one x_6 for which if x_6 cooks, then x_6 is a sailor. For all x_6, x_6 will not take a plane or x_6 will cook.
For all x_6, x_6 is a lawyer or x_6 will cook can be inferred via the universal resolution rule. For all x_6, if x_6 were a lawyer, then x_6 is a sailor can be inferred via the universal rewriting rule.