Consider the following premises. p -> R_16(a_16). forall x_16: ~R_16(x_16). R_16(a_16) -> p. Can we infer p from them? If possible, name the inference rules being used at each step.
 From forall x_16: ~R_16(x_16) we can infer ~R_16(a_16) via universal instantiation. From p -> R_16(a_16), R_16(a_16) -> p we can infer p <-> R_16(a_16) via biconditional introduction. Finally, from p <-> R_16(a_16), ~R_16(a_16) we can infer ~p via biconditional elimination, which contradicts p. Therefore, the answer is no.