Consider the following premises. S_14(a_15) -> p_3. forall x_14: P_15(x_14) -> S_14(x_14). forall x_15: P_15(x_15). Can we infer p_3 from them?
 From forall x_15: P_15(x_15) we can infer P_15(a_15). From forall x_14: P_15(x_14) -> S_14(x_14) we can infer P_15(a_15) -> S_14(a_15). From P_15(a_15) -> S_14(a_15), P_15(a_15) we can infer S_14(a_15). Finally, from S_14(a_15) -> p_3, S_14(a_15) we can infer p_3. Therefore, the answer is yes.