Consider the following premises. For all x_8, x_8 will drive a car if and only if x_8 is a musician. For all x_8, x_8 will drive a car if and only if x_8 is a writer. There is at least one x_8 for which x_8 is not a writer. Can we infer the following from them? There is at least one x_8 for which x_8 is not a musician.
 From the fact that for all x_8, x_8 will drive a car if and only if x_8 is a writer, and that there is at least one x_8 for which x_8 is not a writer we can infer that there is at least one x_8 for which x_8 will not drive a car. Finally, from the fact that for all x_8, x_8 will drive a car if and only if x_8 is a musician, and that there is at least one x_8 for which x_8 will not drive a car we can infer that there is at least one x_8 for which x_8 is not a musician. Therefore, the answer is yes.