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). forall x_15: Q_15(x_15) -> P_3(x_15). forall x_15: P_15(x_15) or Q_15(x_15). R_3(f) or q. forall x_15: R_3(x_15) -> ~P_3(x_15).
forall x_15: Q_15(x_15).