Consider the following premises. For all x_3, if x_3 were an artist, then x_3 is a sailor. There is at least one x_3 for which x_3 will not play squash. For all x_3, if x_3 were a sailor, then x_3 is playing squash. For all x_3, if x_3 were a sailor, then x_3 is an artist. Can we infer the following from them? For all x_3, x_3 is an artist.
 From the fact that for all x_3, if x_3 were a sailor, then x_3 is playing squash, and that there is at least one x_3 for which x_3 will not play squash we can infer that there is at least one x_3 for which x_3 is not a sailor. From the fact that for all x_3, if x_3 were an artist, then x_3 is a sailor, and that for all x_3, if x_3 were a sailor, then x_3 is an artist we can infer that for all x_3, x_3 is an artist if and only if x_3 is a sailor. Finally, from the fact that for all x_3, x_3 is an artist if and only if x_3 is a sailor, and that there is at least one x_3 for which x_3 is not a sailor we can infer that there is at least one x_3 for which x_3 is not an artist, which contradicts that For all x_3, x_3 is an artist. Therefore, the answer is no.