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 y, y is a nurse. Michael is a bartender if and only if James is a nurse.
If Michael were a bartender, then James is a nurse can be inferred via the biconditional elimination rule. If James were a nurse, then Michael is a bartender can be inferred via the biconditional elimination rule.