Consider the following premises. For all x_7, x_7 will drive a car if and only if x_7 is an office clerk. For all x_7, x_7 is not a poet. For all x_7, x_7 is an office clerk if and only if x_7 is a poet. Can we infer the following from them? For all x_7, x_7 will not drive a car.
 From the fact that for all x_7, x_7 will drive a car if and only if x_7 is an office clerk we can infer that for all x_7, if x_7 drives a car, then x_7 is an office clerk. From the fact that for all x_7, x_7 is an office clerk if and only if x_7 is a poet, and that for all x_7, x_7 is not a poet we can infer that for all x_7, x_7 is not an office clerk. Finally, from the fact that for all x_7, if x_7 drives a car, then x_7 is an office clerk, and that for all x_7, x_7 is not an office clerk we can infer that for all x_7, x_7 will not drive a car. Therefore, the answer is yes.