Consider the following premises. forall x_14: P_2(x_14) -> P_14(x_14). forall x_14: P_14(x_14) -> P_2(x_14). W(a_5) or t_1. forall x_14: P_2(x_14) <-> W(x_14). forall x_14: ~P_14(x_14). Can we infer t_1 from them?
 From forall x_14: P_14(x_14) -> P_2(x_14), forall x_14: P_2(x_14) -> P_14(x_14) we can infer forall x_14: P_14(x_14) <-> P_2(x_14). From forall x_14: P_14(x_14) <-> P_2(x_14), forall x_14: ~P_14(x_14) we can infer forall x_14: ~P_2(x_14). From forall x_14: P_2(x_14) <-> W(x_14), forall x_14: ~P_2(x_14) we can infer forall x_14: ~W(x_14). From forall x_14: ~W(x_14) we can infer ~W(a_5). Finally, from W(a_5) or t_1, ~W(a_5) we can infer t_1. Therefore, the answer is yes.