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: t_1 <-> q_12. ~q_12.
t_1 -> q_12 can be inferred via the biconditional elimination rule. q_12 -> t_1 can be inferred via the biconditional elimination rule. ~t_1 can be inferred via the biconditional elimination rule.