What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_12: P_12(x_12) or W(x_12). forall x_12: ~P_12(x_12). forall x_12: W(x_12) <-> Q_7(x_12). forall x_12: Q_7(x_12) -> R_1(x_12). forall x_12: W_1(x_12) -> R_1(x_12).
forall x_12: W(x_12). forall x_12: W(x_12) -> Q_7(x_12). forall x_12: Q_7(x_12) -> W(x_12).