What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_13: Q_13(x_13) -> U_1(x_13). forall x_13: ~Q_13(x_13). ~s or r_2. forall x_13: U_1(x_13) -> Q_13(x_13). s or U_1(f).
U_1(f) or r_2. R_1(f) -> s. forall x_13: ~U_1(x_13). forall x_13: Q_13(x_13) <-> U_1(x_13). forall x_13: U_1(x_13) <-> Q_13(x_13).