Consider the following premises. forall x_15: P_15(x_15) or T(x_15). forall x_15: P_15(x_15) -> ~Q_15(x_15). forall x_15: Q_15(x_15). u -> ~T(i_1). Can we infer r from them? If possible, name the inference rules being used at each step.
We cannot infer that from the premises. Therefore the answer is no.