Consider the following premises. t. ~S_14(a_14). forall x_14: R_14(x_14) -> S_14(x_14). Can we infer R_14(a_14) from them? If possible, name the inference rules being used at each step.
 From forall x_14: R_14(x_14) -> S_14(x_14) we can infer R_14(a_14) -> S_14(a_14) via universal instantiation. Finally, from R_14(a_14) -> S_14(a_14), ~S_14(a_14) we can infer ~R_14(a_14) via modus tollens, which contradicts R_14(a_14). Therefore, the answer is no.