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 z_3, if z_3 were bored, then z_3 is a scientist. There is at least one z_3 for which z_3 is bored or z_3 is not a scientist. For all z_3, z_3 is not bored.
There is at least one z_3 for which if z_3 were a scientist, then z_3 is bored can be inferred via the existential rewriting rule.