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 z for which z is a bartender if and only if z will go running. For all z, if z goes running, then z is a bartender.
There is at least one z for which if z were a bartender, then z is running can be inferred via the existential biconditional elimination rule. There is at least one z for which if z goes running, then z is a bartender can be inferred via the existential biconditional elimination rule.