Consider the following premises. exists x_11: P_11(x_11) or Q_11(x_11). forall x_11: R_11(x_11) -> P(x_11). forall x_11: ~P_11(x_11) or R_11(x_11). forall x_11: Q_11(x_11) -> P(x_11). forall x_11: P(x_11) -> Q(x_11). Can we infer forall x_11: Q_11(x_11) -> P(x_11) from them? If possible, name the inference rules being used at each step.
That is one of the premises. Therefore, the answer is yes.