Consider the following premises. exists x_11: U(x_11) -> R(x_11). forall x_11: Q_6(x_11) -> P(x_11). forall x_11: R(x_11) -> Q_6(x_11). forall x_11: Q(x_11) or ~P(x_11). Can we infer forall x_11: R(x_11) -> Q_6(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.