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: s_3 <-> p. p <-> q_13. ~q_13.
s_3 -> p can be inferred via the biconditional elimination rule. p -> q_13 can be inferred via the biconditional elimination rule. p -> s_3 can be inferred via the biconditional elimination rule. q_13 -> p can be inferred via the biconditional elimination rule. ~p can be inferred via the biconditional elimination rule.