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: ~w. w <-> q_19. S_7(a_7) <-> p. p -> q_19. forall x_7: R_7(x_7) <-> S_7(x_7).
w -> q_19 can be inferred via the biconditional elimination rule. S_7(a_7) -> p can be inferred via the biconditional elimination rule. q_19 -> w can be inferred via the biconditional elimination rule. p -> S_7(a_7) can be inferred via the biconditional elimination rule. ~q_19 can be inferred via the biconditional elimination rule. forall x_7: R_7(x_7) -> S_7(x_7) can be inferred via the universal biconditional elimination rule. forall x_7: S_7(x_7) -> R_7(x_7) can be inferred via the universal biconditional elimination rule.