Consider the following premises. Michael is a taxi driver if and only if Karen is listening to a song. Jessica is not curious. For all x_21, x_21 is curious if and only if x_21 is poor. Karen is listening to a song if and only if Jessica is poor. Can we infer the following from them? If we can, name the inference rule being used: Michael is not a taxi driver or it is windy.
 From the fact that for all x_21, x_21 is curious if and only if x_21 is poor we can infer that Jessica is curious if and only if Jessica is poor via universal instantiation. From the fact that Jessica is curious if and only if Jessica is poor, and that Jessica is not curious we can infer that Jessica is not poor via biconditional elimination. From the fact that Karen is listening to a song if and only if Jessica is poor, and that Jessica is not poor we can infer that Karen is not listening to a song via biconditional elimination. From the fact that Michael is a taxi driver if and only if Karen is listening to a song, and that Karen is not listening to a song we can infer that Michael is not a taxi driver via biconditional elimination. Finally, from the fact that Michael is not a taxi driver we can infer that Michael is not a taxi driver or it is windy via addition. Therefore, the answer is yes.