Consider the following premises. t_1 or ~S_16(f). forall x_16: R_16(x_16) or S_16(x_16). ~R_16(f) or t. t_1 <-> t. Can we infer t_1 from them? If possible, name the inference rules being used at each step.
 From forall x_16: R_16(x_16) or S_16(x_16) we can infer R_16(f) or S_16(f) via universal instantiation. From t_1 or ~S_16(f) we can infer S_16(f) -> t_1 via rewriting. From R_16(f) or S_16(f), ~R_16(f) or t we can infer S_16(f) or t via resolution. From t_1 <-> t we can infer t -> t_1 via biconditional elimination. Finally, from S_16(f) -> t_1, t -> t_1, S_16(f) or t we can infer t_1 via disjunction elimination. Therefore, the answer is yes.