Consider the following premises. For all x, if x drives a car, then x is an artist. For all x, x is a janitor. For all x, if x were an artist, then x is driving a car. For all x, x is an astronaut or x will not drive a car. For all x, if x were an astronaut, then x is not a janitor. Can we infer the following from them? There is at least one x for which x is an artist.
 From the fact that for all x, x is an astronaut or x will not drive a car we can infer that for all x, if x drives a car, then x is an astronaut. From the fact that for all x, if x were an astronaut, then x is not a janitor, and that for all x, x is a janitor we can infer that for all x, x is not an astronaut. From the fact that for all x, if x were an artist, then x is driving a car, and that for all x, if x drives a car, then x is an artist we can infer that for all x, x is an artist if and only if x will drive a car. From the fact that for all x, if x drives a car, then x is an astronaut, and that for all x, x is not an astronaut we can infer that for all x, x will not drive a car. Finally, from the fact that for all x, x is an artist if and only if x will drive a car, and that for all x, x will not drive a car we can infer that for all x, x is not an artist, which contradicts that There is at least one x for which x is an artist. Therefore, the answer is no.