Consider the following premises. forall x_12: W(x_12) -> Q_6(x_12). forall x_12: P_12(x_12) or ~Q_6(x_12). exists x_12: P_12(x_12) <-> Q_12(x_12). Can we infer forall x_12: W(x_12) -> Q_6(x_12) from them? If possible, name the inference rules being used at each step.
That is one of the premises. Therefore, the answer is yes.