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: ~R_16(a_16) or q. p_9 -> p. q -> p. p_9 <-> S_16(a_16). forall x_16: R_16(x_16) or S_16(x_16).
p_9 -> S_16(a_16) can be inferred via the biconditional elimination rule. S_16(a_16) -> p_9 can be inferred via the biconditional elimination rule.