Consider the following premises. p_2 -> Q_8(h). forall x_8: P_8(x_8) <-> Q_8(x_8). p_2 or P_8(h). Can we infer Q_8(h) from them? If possible, name the inference rules being used at each step.
 From forall x_8: P_8(x_8) <-> Q_8(x_8) we can infer forall x_8: P_8(x_8) -> Q_8(x_8) via universal biconditional elimination. From forall x_8: P_8(x_8) -> Q_8(x_8) we can infer P_8(h) -> Q_8(h) via universal instantiation. Finally, from p_2 -> Q_8(h), P_8(h) -> Q_8(h), p_2 or P_8(h) we can infer Q_8(h) via disjunction elimination. Therefore, the answer is yes.