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: p_2 <-> r_4. p_2 -> ~P_14(a_14). forall x_14: P_14(x_14).
p_2 -> r_4 can be inferred via the biconditional elimination rule. r_4 -> p_2 can be inferred via the biconditional elimination rule.