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: forall x: ~R_1(x). q. R_1(j) <-> q_7.
R_1(j) -> q_7 can be inferred via the biconditional elimination rule. q_7 -> R_1(j) can be inferred via the biconditional elimination rule.