Consider the following premises. forall x_10: R(x_10) <-> Q_10(x_10). forall x_10: R(x_10) <-> Q_10(x_10). Can we infer ~(Q_10(j_3) -> R(j_3)) from them? If possible, name the inference rules being used at each step.
That contradicts the premises. Therefore the answer is no.