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_10, if x_10 were a taxi driver, then x_10 is a lawyer. Susan is a bartender if and only if Michael is a lawyer.
If Susan were a bartender, then Michael is a lawyer can be inferred via the biconditional elimination rule. If Michael were a lawyer, then Susan is a bartender can be inferred via the biconditional elimination rule.