Consider the following premises. forall x_6: ~T_4(x_6). forall x_6: P_6(x_6) or T_4(x_6). exists x_6: U(x_6). forall x_6: ~P_6(x_6) or T(x_6). Can we infer forall x_6: ~(U(x_6) and T(x_6)) from them?
 From forall x_6: P_6(x_6) or T_4(x_6), forall x_6: ~P_6(x_6) or T(x_6) we can infer forall x_6: T_4(x_6) or T(x_6). From forall x_6: T_4(x_6) or T(x_6), forall x_6: ~T_4(x_6) we can infer forall x_6: T(x_6). Finally, from exists x_6: U(x_6), forall x_6: T(x_6) we can infer exists x_6: U(x_6) and T(x_6), which contradicts forall x_6: ~(U(x_6) and T(x_6)). Therefore, the answer is no.