Consider the following premises. forall x_15: Q(x_15). t. forall x_15: S(x_15) and Q_15(x_15). Can we infer S(b) and t from them? If possible, name the inference rules being used at each step.
 From forall x_15: S(x_15) and Q_15(x_15) we can infer forall x_15: S(x_15) via universal simplification. From forall x_15: S(x_15), forall x_15: Q(x_15) we can infer forall x_15: S(x_15) and Q(x_15) via universal conjunction. From forall x_15: S(x_15) and Q(x_15) we can infer S(b) and Q(b) via universal instantiation. From S(b) and Q(b) we can infer S(b) via simplification. Finally, from S(b), t we can infer S(b) and t via conjunction. Therefore, the answer is yes.