What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_15: P_15(x_15) <-> T_4(x_15). forall x_15: ~T_4(x_15). exists x_15: P_12(x_15) or P_15(x_15). forall x_15: P_12(x_15) -> T_4(x_15).
forall x_15: ~P_12(x_15). forall x_15: P_15(x_15) -> T_4(x_15). forall x_15: T_4(x_15) -> P_15(x_15). forall x_15: ~P_15(x_15).