Consider the following premises. t or S(a_19). S_19(a_19) -> u_1. forall x_19: S(x_19) -> S_19(x_19). t -> u_1. q_1 -> ~u_1. Can we infer ~q_2 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.