Consider the following premises. Q_13(a_10) or ~t. W(a_10) or t. forall x_13: W(x_13) <-> Q_13(x_13). Can we infer Q_13(a_10) from them? If possible, name the inference rules being used at each step.
 From forall x_13: W(x_13) <-> Q_13(x_13) we can infer forall x_13: W(x_13) -> Q_13(x_13) via universal biconditional elimination. From forall x_13: W(x_13) -> Q_13(x_13) we can infer W(a_10) -> Q_13(a_10) via universal instantiation. From Q_13(a_10) or ~t we can infer t -> Q_13(a_10) via rewriting. Finally, from W(a_10) -> Q_13(a_10), t -> Q_13(a_10), W(a_10) or t we can infer Q_13(a_10) via disjunction elimination. Therefore, the answer is yes.