Consider the following premises. forall x_10: ~P_10(x_10) or R_10(x_10). forall x_10: P_10(x_10) or Q_10(x_10). Q_10(a_8) <-> t. R_10(a_8) -> t. Can we infer t_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.