Consider the following premises. forall x_13: ~Q_4(x_13). exists x_13: T_2(x_13) <-> T(x_13). forall x_13: Q_4(x_13) -> Q_6(x_13). forall x_13: Q_4(x_13) <-> T(x_13). forall x_13: Q_6(x_13) -> T(x_13). Can we infer forall x_13: Q_4(x_13) -> Q_6(x_13) from them? If possible, name the inference rules being used at each step.
That is one of the premises. Therefore, the answer is yes.