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: t_1 -> r_3. forall y: Q(y) <-> W(y). r_3 -> W(d_2).
t_1 -> W(d_2) can be inferred via the transitivity rule. forall y: Q(y) -> W(y) can be inferred via the universal biconditional elimination rule. forall y: W(y) -> Q(y) can be inferred via the universal biconditional elimination rule.