Consider the following premises. w <-> q. w <-> R_10(a_10). forall x_10: ~R_10(x_10). Can we infer q from them? If possible, name the inference rules being used at each step.
 From forall x_10: ~R_10(x_10) we can infer ~R_10(a_10) via universal instantiation. From w <-> R_10(a_10), ~R_10(a_10) we can infer ~w via biconditional elimination. Finally, from w <-> q, ~w we can infer ~q via biconditional elimination, which contradicts q. Therefore, the answer is no.