Consider the following premises. p_2. p_2 <-> q_3. w_2 -> q_3. Can we infer q_3 from them? If possible, name the inference rules being used at each step.
 From p_2 we can infer p_2 or w_2 via addition. From p_2 <-> q_3 we can infer p_2 -> q_3 via biconditional elimination. Finally, from p_2 -> q_3, w_2 -> q_3, p_2 or w_2 we can infer q_3 via disjunction elimination. Therefore, the answer is yes.