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_1. ~t. q <-> t.
q_1 and ~t can be inferred via the conjunction rule. ~t and q_1 can be inferred via the conjunction rule. q -> t can be inferred via the biconditional elimination rule. t -> q can be inferred via the biconditional elimination rule. ~q can be inferred via the biconditional elimination rule.