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(x) <-> W_1(x). r_2 -> R(a_14). W_1(a_14) -> r_2.
W_1(a_14) -> R(a_14) can be inferred via the transitivity rule. forall x: R(x) -> W_1(x) can be inferred via the universal biconditional elimination rule. forall x: W_1(x) -> R(x) can be inferred via the universal biconditional elimination rule.