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: R_3(x) <-> W(x). forall x: R(x) -> R_3(x). forall x: R(x).
forall x: R_3(x) can be inferred via the universal modus ponens rule. forall x: R_3(x) -> W(x) can be inferred via the universal biconditional elimination rule. forall x: W(x) -> R_3(x) can be inferred via the universal biconditional elimination rule.