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: q <-> w. q_10 -> w. ~q_10. w <-> q_10.
q -> w can be inferred via the biconditional elimination rule. w -> q_10 can be inferred via the biconditional elimination rule. w -> q can be inferred via the biconditional elimination rule. q_10 -> w can be inferred via the biconditional elimination rule. ~w can be inferred via the biconditional elimination rule.