Consider the following premises. There is at least one x_18 for which x_18 will play squash. For all x_18, x_18 is a poet. For all x_18, x_18 will drive a car if and only if x_18 will sleep. For all x_18, if x_18 plays squash, then x_18 is driving a car. Can we infer the following from them? For all x_18, x_18 will not drive a car.
 From the fact that for all x_18, x_18 will drive a car if and only if x_18 will sleep we can infer that for all x_18, if x_18 sleeps, then x_18 is driving a car. From the fact that there is at least one x_18 for which x_18 will play squash we can infer that there is at least one x_18 for which x_18 will play squash or x_18 will sleep. From the fact that for all x_18, if x_18 plays squash, then x_18 is driving a car, that for all x_18, if x_18 sleeps, then x_18 is driving a car, and that there is at least one x_18 for which x_18 will play squash or x_18 will sleep we can infer that there is at least one x_18 for which x_18 will drive a car. From the fact that there is at least one x_18 for which x_18 will drive a car, and that for all x_18, x_18 is a poet we can infer that there is at least one x_18 for which x_18 will drive a car and x_18 is a poet. Finally, from the fact that there is at least one x_18 for which x_18 will drive a car and x_18 is a poet we can infer that there is at least one x_18 for which x_18 will drive a car, which contradicts that For all x_18, x_18 will not drive a car. Therefore, the answer is no.