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 a bartender, then x_3 is working. There is at least one x_3 for which x_3 is not a bartender. For all x_3, x_3 is a bartender or x_3 will not work.
For all x_3, if x_3 works, then x_3 is a bartender can be inferred via the universal rewriting rule.