Consider the following premises. For all z_4, if z_4 were poor, then z_4 is a politician. For all z_4, z_4 is poor or z_4 will not take a plane. Sarah is not a politician. For all z_4, if z_4 were a politician, then z_4 is taking a plane. Can we infer the following from them? Sarah is taking a plane.
 From the fact that for all z_4, z_4 is poor or z_4 will not take a plane we can infer that for all z_4, if z_4 takes a plane, then z_4 is poor. From the fact that for all z_4, if z_4 takes a plane, then z_4 is poor, and that for all z_4, if z_4 were poor, then z_4 is a politician we can infer that for all z_4, if z_4 takes a plane, then z_4 is a politician. From the fact that for all z_4, if z_4 were a politician, then z_4 is taking a plane, and that for all z_4, if z_4 takes a plane, then z_4 is a politician we can infer that for all z_4, z_4 is a politician if and only if z_4 will take a plane. From the fact that for all z_4, z_4 is a politician if and only if z_4 will take a plane we can infer that Sarah is a politician if and only if Sarah is taking a plane. Finally, from the fact that Sarah is a politician if and only if Sarah is taking a plane, and that Sarah is not a politician we can infer that Sarah is not taking a plane, which contradicts that Sarah is taking a plane. Therefore, the answer is no.