Consider the following premises. For all x_1, x_1 is an artist and x_1 is a lawyer. For all x_1, x_1 is curious. For all x_1, if x_1 were an artist, then x_1 is taking a plane. Can we infer the following from them? There is at least one x_1 for which x_1 will not take a plane.
 From the fact that for all x_1, x_1 is an artist and x_1 is a lawyer we can infer that for all x_1, x_1 is an artist. From the fact that for all x_1, if x_1 were an artist, then x_1 is taking a plane, and that for all x_1, x_1 is an artist we can infer that for all x_1, x_1 will take a plane. From the fact that for all x_1, x_1 will take a plane, and that for all x_1, x_1 is curious we can infer that for all x_1, x_1 will take a plane and x_1 is curious. Finally, from the fact that for all x_1, x_1 will take a plane and x_1 is curious we can infer that for all x_1, x_1 will take a plane, which contradicts that There is at least one x_1 for which x_1 will not take a plane. Therefore, the answer is no.