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: forall x_16: ~R_16(x_16). s. R_16(a_16) <-> t.
R_16(a_16) -> t can be inferred via the biconditional elimination rule. t -> R_16(a_16) can be inferred via the biconditional elimination rule.