Consider the following premises. forall x_17: P_17(x_17) -> Q_17(x_17). ~s. t. P_17(a_16) <-> s. forall x_17: Q_17(x_17) -> P_17(x_17). Can we infer ~t from them? If possible, name the inference rules being used at each step.
That contradicts the premises. Therefore the answer is no.