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_3, if x_3 were excited, then x_3 is sleeping. There is at least one x_3 for which x_3 is excited or x_3 will not sleep.
There is at least one x_3 for which if x_3 sleeps, then x_3 is excited can be inferred via the existential rewriting rule.