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_17 <-> u_3. ~q_17. p_17 <-> q_17.
p_17 -> u_3 can be inferred via the biconditional elimination rule. p_17 -> q_17 can be inferred via the biconditional elimination rule. u_3 -> p_17 can be inferred via the biconditional elimination rule. q_17 -> p_17 can be inferred via the biconditional elimination rule. ~p_17 can be inferred via the biconditional elimination rule.