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_3 <-> R(a_15). forall x_3: R(x_3) -> R_1(x_3). ~R_1(a_15). s_1 -> q_3.
q_3 -> R(a_15) can be inferred via the biconditional elimination rule. R(a_15) -> q_3 can be inferred via the biconditional elimination rule.