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_1 <-> s. ~w. p_1 <-> s_3. w <-> s_3.
p_1 -> s can be inferred via the biconditional elimination rule. p_1 -> s_3 can be inferred via the biconditional elimination rule. w -> s_3 can be inferred via the biconditional elimination rule. s -> p_1 can be inferred via the biconditional elimination rule. s_3 -> p_1 can be inferred via the biconditional elimination rule. s_3 -> w can be inferred via the biconditional elimination rule. ~s_3 can be inferred via the biconditional elimination rule.