Consider the following premises. forall x_15: P_15(x_15) or U(x_15). forall x_15: U(x_15) -> R_3(x_15). p -> ~R_3(g). forall x_15: R_15(x_15) -> R_3(x_15). forall x_15: ~P_15(x_15) or R_15(x_15). Can we infer ~p from them?
 From forall x_15: P_15(x_15) or U(x_15), forall x_15: ~P_15(x_15) or R_15(x_15) we can infer forall x_15: U(x_15) or R_15(x_15). From forall x_15: U(x_15) -> R_3(x_15), forall x_15: R_15(x_15) -> R_3(x_15), forall x_15: U(x_15) or R_15(x_15) we can infer forall x_15: R_3(x_15). From forall x_15: R_3(x_15) we can infer R_3(g). Finally, from p -> ~R_3(g), R_3(g) we can infer ~p. Therefore, the answer is yes.