Consider the following premises. forall x_14: ~R_14(x_14). w. p_8 <-> R_14(i). Can we infer p_8 from them? If possible, name the inference rules being used at each step.
 From forall x_14: ~R_14(x_14) we can infer ~R_14(i) via universal instantiation. Finally, from p_8 <-> R_14(i), ~R_14(i) we can infer ~p_8 via biconditional elimination, which contradicts p_8. Therefore, the answer is no.