Consider the following premises. There is at least one x_10 for which x_10 will drive a car if and only if x_10 is curious. For all x_10, x_10 will not write a letter. For all x_10, if x_10 were curious, then x_10 is driving a car. For all x_10, if x_10 were curious, then x_10 is writing a letter. Can we infer the following from them? There is at least one x_10 for which x_10 will not drive a car.
 From the fact that there is at least one x_10 for which x_10 will drive a car if and only if x_10 is curious we can infer that there is at least one x_10 for which if x_10 drives a car, then x_10 is curious. From the fact that there is at least one x_10 for which if x_10 drives a car, then x_10 is curious, and that for all x_10, if x_10 were curious, then x_10 is driving a car we can infer that there is at least one x_10 for which x_10 will drive a car if and only if x_10 is curious. From the fact that for all x_10, if x_10 were curious, then x_10 is writing a letter, and that for all x_10, x_10 will not write a letter we can infer that for all x_10, x_10 is not curious. Finally, from the fact that there is at least one x_10 for which x_10 will drive a car if and only if x_10 is curious, and that for all x_10, x_10 is not curious we can infer that there is at least one x_10 for which x_10 will not drive a car. Therefore, the answer is yes.