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 <-> S_16(a_16). forall x_16: R_16(x_16) or S_16(x_16). ~R_16(a_16) or r_12. t -> r_1. r_12 -> r_1.
t -> S_16(a_16) can be inferred via the biconditional elimination rule. S_16(a_16) -> t can be inferred via the biconditional elimination rule.