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_7 <-> q. p_7 or ~q.
q -> p_7 can be inferred via the rewriting rule. p_7 -> q can be inferred via the biconditional elimination rule. q -> p_7 can be inferred via the biconditional elimination rule.