Consider the following premises. For all x_6, x_6 is rich. For all x_6, if x_6 were a musician, then x_6 is a taxi driver. For all x_6, x_6 is a scientist. For all x_6, if x_6 were rich, then x_6 is a musician. Can we infer the following from them? For all x_6, x_6 is a taxi driver.
 From the fact that for all x_6, if x_6 were rich, then x_6 is a musician, and that for all x_6, if x_6 were a musician, then x_6 is a taxi driver we can infer that for all x_6, if x_6 were rich, then x_6 is a taxi driver. Finally, from the fact that for all x_6, if x_6 were rich, then x_6 is a taxi driver, and that for all x_6, x_6 is rich we can infer that for all x_6, x_6 is a taxi driver. Therefore, the answer is yes.