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_3 for which x_3 is a soldier or x_3 will not take a plane. For all x_3, if x_3 were a soldier, then x_3 is sleeping.
There is at least one x_3 for which if x_3 takes a plane, then x_3 is a soldier can be inferred via the existential rewriting rule.